Top end suggestions

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MoparAnglia

MoparAnglia

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Rugby, England
Hi there, my name is Jamie and I'm from sunny (?!) England. First things first, I'd like to apologise for crashing this party as I'm sure you'll gather from my user name, I don't have an A-body. In my defense, my little sit-up-n-beg is LA-powered! Or rather it was, and will be again.

I'm looking for a little help or guidance on parts selection. My .030 over 318 will be getting a Scat cast 4" crank, Scat i-beams and the Hughes Engines dished slugs (-18cc) which are being balanced this week.

I'm leaning heavily towards the RHS heads from Brian at IMM with a bit more work (basic street/strip porting job) and a light shave for 60cc chambers. Yes, I'd like to run ally heads especially as the weight saving would have more of an impact in a 2400lb car but, well, these are as far as my budget goes...

I already have Comp Magnum (shaft) 1.5 rockers, an RPM intake and a 650DP which I plan to upgrade using a Proform main body.

Cam selection has me stumped though...I had planned on a big hydraulic flat tappet (XE295HL) to use the Mopar lifter advantage but was surprised to see the low power peak it gave on Brian's 410. I'd like to shoot for closer to, or right on 6k peak to suit my gearing and car weight. Ideas?

I'm not against a Hyd roller as the block has not been finished yet but off-the-shelf grinds look quite small in comparison ([email protected]) and give up lift too. Obviously a rocker ratio change would sort the lift but I thought I'd consult the oracles on this one.:mrgreen:
 
What is your engines compression and what stall is your torque converter???
Are you running a single plane intake or dual plain intake????

If you ran this car before, what was your et and mph.
 
I"m not a cam expert, but I have a 410 stroker based on a 360/5.9L block. The 4" stroker crank on the sb makes great torque in the 2500 to 4000 rpm and the HP will peak at 6000 or below. You can get a cam that can reach the hp at higher rpm but the cast crank will be safer at 6500 or lower rpm. My combo is 4" cast crank, RHS heads mild port work, hyd roller cam w stock roller lifters 242/246 dur-.509 lift from Hughes. Give the cam manuf the engine specs, trans, and convertor choice, weight, and use of car ; they will set you up w good cam spec.
 
Hi from Germany!

if your goal is to shift the powerband upwards then i´d try a single plane intake like a victor or M1. should work good for you. but keep in mind, the longer the stroke the higher is piston speed and this will limit your rpm.

Michael
 
Compression comes out at 10.2ish with this combo.
As stated, I'll be using a Performer RPM dual plane (I might try a Victor further down the road). The converter is a 10 inch item nominally rated at 3500.

With the old 318 using THOSE TRW forged flat tops pistons (20 thousand leagues under the deck) and way too much cam for the compression and stock converter the car went 12s at 110.
 
Balancing done, bobweight squeezed in at 1730g for internal balance without mallory slugs.
Any cam recommendations then? Its a pretty light car so giving up a little torque for some top end is acceptable. Shift around 62-6500 max would be cool.

Other parts going in include a Charlies Oil Pan (16 inches WIDE!!!!) and CSI electric water pump.
FYI Its got 4.11 gears and 31 inch tyres.

Thanks

Jamie
 
Why not go with a solid? The generally have a wider power band and rev higher.

P.S. welcome to the board from one Brit to another.
 
Party/gate crashers welcomed.

Welcome aboard!
 
Your car was moving fast because of it's light weight.
You would only need about a 300 horse engine to go mid to low 12's and that's what your car was doing with the 318.

Two big improvements would be a way bigger carb.
Try to sell the smaller holley 650 and put the rest of your money in a good hp 950 cfm holley or 1050 crm dominator hp carb.
Secondly i would go with a victor single plain intake.

As far as the cam goes, you would need to know what the head flow #'s are.
BUT...............................
This is one of those situations that everything might be matched up perfect with your engine but the car is going to need a ton of attention.

You might have hooked up before with the stock converter and a cam that was way to big because the car DID NOT MAKE MUCH TORQUE, and moved nice and smooth out of the hole on the starting line because of it.

Your installing a stoker in a very small car and will have a ton of torque.

I hope you have wheelie bars, cause i think you might need them.
Maybe you won't, but i would definitely talk to as many people as possible that run anglia's at a drag strip to understand how they react with certain engines and power levels.

You might have wheelie bars all ready and have a good understanding of the vehicle and it's problems ----- and if that's the case then forget what i just said.

Good luck with the heads and pick your cam last based on the end result of the heads and the work being done.

That 3500 converter might stall at a lower rpm due to the light weight car.
What kind of converter is it???????
 
your best bet is to ask Brian about the cam, but i would go solid, i have the same rockers with a mild solid comp cam 244/252 @.050 520/540 lift in a 3400 lbs demon, stock stroke 360 running low 12's, i would guess with the heads, the "small" 390", and the lowish 10.2cr, maybe something in the 248 to 252 @.050 range. Also as stated above sell the 650 and go to the Holley 950 HP.
 
fishy68 said:
Why not go with a solid? The generally have a wider power band and rev higher.

P.S. welcome to the board from one Brit to another.
Click to expand...

Thanks for the welcome ex-pat!

I know its lazy, but side-stepping valve lash issues appeals. I noticed Joe Sherman got some serious results from an Eddy-headed 408 combo with a Mutha Thumpr cam a couple of years ago. :read2:
 
T67POWER said:
Your car was moving fast because of it's light weight.
You would only need about a 300 horse engine to go mid to low 12's and that's what your car was doing with the 318.

Two big improvements would be a way bigger carb.
Try to sell the smaller holley 650 and put the rest of your money in a good hp 950 cfm holley or 1050 crm dominator hp carb.
Secondly i would go with a victor single plain intake.

As far as the cam goes, you would need to know what the head flow #'s are.
BUT...............................
This is one of those situations that everything might be matched up perfect with your engine but the car is going to need a ton of attention.

You might have hooked up before with the stock converter and a cam that was way to big because the car DID NOT MAKE MUCH TORQUE, and moved nice and smooth out of the hole on the starting line because of it.

Your installing a stoker in a very small car and will have a ton of torque.

I hope you have wheelie bars, cause i think you might need them.
Maybe you won't, but i would definitely talk to as many people as possible that run anglia's at a drag strip to understand how they react with certain engines and power levels.

You might have wheelie bars all ready and have a good understanding of the vehicle and it's problems ----- and if that's the case then forget what i just said.

Good luck with the heads and pick your cam last based on the end result of the heads and the work being done.

That 3500 converter might stall at a lower rpm due to the light weight car.
What kind of converter is it???????
Click to expand...

The car didn't hook before - it covered the 60 foot like it was going uphill. No torque at all.

So yeah, I realise the chassis tune will keep me entertained but its running a 4-linked 9 inch with plenty of adjustment. Too much air under the front tyres would be a nice problem to have, as I plan on running treads at the track (Sportsman Pros).

Head flow is a little bit of an unknown but I think around 280 at .550 or .600 would be a start. Having said that, I fully expect the 3.94" bore to have an impact on the bench figures, and obviously the intake manifold will too.

If swapping out the carb (as opposed to stepping up to the Proform 750 centre) is needed then that's what I'll do. I may go to a specialist like BIGS or AED once I have the rest nailed down.

Not sure what the converter is - it came as an unfitted spare when I bought the car, and I subsequently had a trans specialist check it over. The bets were on it being a Turbo Action item. If it doesn't suit the car then that will get an upgrade too. I had thought that the high torque output and low weight might cancel each other out to an extent.
 
EL5DEMON340 said:
your best bet is to ask Brian about the cam, but i would go solid, i have the same rockers with a mild solid comp cam 244/252 @.050 520/540 lift in a 3400 lbs demon, stock stroke 360 running low 12's, i would guess with the heads, the "small" 390", and the lowish 10.2cr, maybe something in the 248 to 252 @.050 range. Also as stated above sell the 650 and go to the Holley 950 HP.
Click to expand...


Okay, did you have to mod the oil system to run the solid? I've seen tubed galleys and crossover pipes on some set-ups.

I'd have swung for more compression but a switch to flat top slugs with a slightly larger chamber would have still given over 11:1. And our pump gas is roughly equivalent to your 91.

Yeah, looks like the carb's a given..:thumblef:
 
If i had to guess i would run a cam with 570 to 590 lift and have a duration @ 50 between 255 to 265.

Pick a cam that has at least 90 to 100 overlap and ground on a 106 (lsa.lobe separation angle)

I would install a 2.08 intake valve in the heads also.
 
T67POWER said:
If i had to guess i would run a cam with 570 to 590 lift and have a duration @ 50 between 255 to 265.

Pick a cam that has at least 90 to 100 overlap and ground on a 106 (lsa.lobe separation angle)

I would install a 2.08 intake valve in the heads also.
Click to expand...

If you go with a hyd. roller cam, we can get the lift well over .600 with a 1.6 rocker. If your staying with a 3.9xx bore the 2.02 valve is going to make more power regardless of what the flowbench says.

I would concentrate the power from 3000 to 6000rpm with 500 rpm overrev for a shift point.
Carb needs to be at least 950HP and would probably run better (light car) with a 1000hp. Or....if we're porting the heads, then use an Indy intake, port the head opening for it, run the magnum rhs head with Hughes 1.65 paired rockers and we can convert the Indy intake for a 4500carb and run a 1050. With 11:1 you should see a slight improvement with that topend.
If we did that though, I would use a solid roller cam. Lots of options.
Brian
 
ou812 said:
If you go with a hyd. roller cam, we can get the lift well over .600 with a 1.6 rocker. If your staying with a 3.9xx bore the 2.02 valve is going to make more power regardless of what the flowbench says.

I would concentrate the power from 3000 to 6000rpm with 500 rpm overrev for a shift point.
Carb needs to be at least 950HP and would probably run better (light car) with a 1000hp. Or....if we're porting the heads, then use an Indy intake, port the head opening for it, run the magnum rhs head with Hughes 1.65 paired rockers and we can convert the Indy intake for a 4500carb and run a 1050. With 11:1 you should see a slight improvement with that topend.
If we did that though, I would use a solid roller cam. Lots of options.
Brian
Click to expand...


Thanks for that Brian, bottom end already bought n balanced, 18cc dish with zero deck and 40 thou gasket will swing in at 10.2 or so with a 60cc chamber. Our gas is similar to your 91 octane so 11:1 on iron heads was deemed risky. Already running the shaft mount set-up (although I realise 1.5s are not ideal) so would like to retain them if possible.

I realise there's too much shrouding on a 3.94 bore with bigger than 2.02 intake valve so that's what I'll go with.

Budget limits mean spending extra on valvetrain (rockers) would take compromising elsewhere. I'd like a set-up where any future upgrades don't require a total rebuild. So I can cope with limited lift if the grind will allow a rocker change further down the line.

Obviously the reality of living thousands of miles away precludes sending heads back for porting after a while, so I'll spend $$$ on whatever I need long-term. Likewise block prep - I don't want a complete tear-down after 12 months to run different lifters so was thinking Hughes own Hydraulic rollers?
 
Brian is right about the bore size and valve size.
I got a little to involved with thinking about giving that stroker more air.:-D

Your car should be in the 10's.
Maybe this is something you have to think about as far as safety and what your car has for equipment.

I have to admit, i am jealous of the cars weight.
Your going for a sweet ride.
The parts will last a long time because of it.
 
T67POWER said:
Brian is right about the bore size and valve size.
I got a little to involved with thinking about giving that stroker more air.:-D

Your car should be in the 10's.
Maybe this is something you have to think about as far as safety and what your car has for equipment.

I have to admit, i am jealous of the cars weight.
Your going for a sweet ride.
The parts will last a long time because of it.
Click to expand...

Safety? There's not enough room in the car for me to get my head between my legs to kiss my:butthead: goodbye so I've got a 12-point cage, the seats are chassis-mounted and bolted to the cage and there'll be 5-point harnesses. A flexplate/trans shield is being allowed for with a new trans tunnel too. Motor is on motorplate and midplate and I've got 2 driveshaft loops (even though its about 22 inches long!). All fluid lines/tanks are contained within the perimeter of the chassis. I don't plan on rolling it but...:toothy10:
 
Great.
Sounds like a nice thought out car.---------------GOOD LUCK :burnout:
 
this might be a nice cam for you,comp 20-629-5 269mm-8 its a solid flat tappet grind pulls hard from3000-6500 243-247@50 549-560 lift.this cam is in my 360 it is a real bad *** sounding camshaft.with your very light car it should scream.havent been able to get 1/4 mile times yet but i beat my buddies 383 stroker camaro bad and his car runs 12.90@108
 
T67POWER said:
Great.
Sounds like a nice thought out car.---------------GOOD LUCK :burnout:
Click to expand...


Thanks, there are a good number of rapid Anglia street cars over here (the quickest runs 8.20s!) so I'll not stand out in that regard, but none of em are Mopar-powered! Looking forward to claiming some Bowtie scalps.
 
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