365 Street Stormer

[RAMM]

365 Street Stormer

The build is about as basic and unassuming as it can get--'86 360 truck block, 4.030" Probe

flat-tops with a cusom dish, Magnum rods w/ARP bolts, stock crank .020/.020, Comp Magnum 280H cam,

stock stamped rockers/shafts/ "Stealth" ported J heads 2.02/1.60 valves flow 245 cfm @ .450", baffled truck pan

and the wild card-a ported Edelbrock Torker 340 manifold.

I say wildcard because this manifold is shatty! By shatty I mean--SMALL!

I used it on a circle track build a few years ago.

I thought it may be a good fit with a 10-1 comp 360 2bl. It wasn't--371 hp was observed which was way under the 415hp when a Weiand X-celerator was on it. I can't leave well enough alone so I took the Edelbrock manifold as a personal challenge and spent about 15 hrs on it.

I carved and I carved and I carved.

The runners are still way too short for big torque but this engine is slated for an early gen

Dak with a 5 spd, the emphasis here is on getting the right cross section and straightening the curves as much as possible. Looking at it I think it willbe surprising. Remembering just how small the plenum and runners were before, I don't know what I was thinking using it

unported in the first place! This should be on the pump by next Saturday. Anyone care to

guess on HP/TQ and at what RPM? J.Rob

 

[rumblefish360]

I would hope it to be north of 400, I don't know though. I never really THAT intake.
I do wonder how much more you could open up the plenum and how much you can take out of those side triangles. How far could you mello the triangle out into an oval?

Question!
Were you able to gasket match the port window all the way up?

 

[IQ52]

Hah! $1,000 intake manifold...............should make 800 HP. You crack me up Jesse

 

[RAMM]

I would hope it to be north of 400, I don't know though. I never really THAT intake.
I do wonder how much more you could open up the plenum and how much you can take out of those side triangles. How far could you mello the triangle out into an oval?

Question!
Were you able to gasket match the port window all the way up?

There is simply NO material to work those stupid triangles any more than I already have. They are about .080" thick as of now.

Yes I was able to get the ports to a full 360 size all the way up. The real challenge was getting the port entrance at the plenum large enough. If it wasn't even more work I would have liked to have welded all around the carb pad--then I could have raised the runners AND blended out those awesome triangles in the plenum. Like I say this manifold is an unknown (to me) quantity. I love these experiments though.

Secretly yes, I think it will be well north of 400 hp. If not I will put a different manifold on it and save this one for a budget/hot 318 build. J.Rob

 

[rumblefish360]

LOL @ IQ

Well RAMM, welding up the intake and etc... Is a whole lotta work! I wouldn't go there myself. Though I love to tinker and do similar kind of stuff. I limit my experiments in carving. Mostly to the carb.

The intake looks good. Looking forward to the dunk results.
430HP 390lbs. torque. LMAO, I should have just thrown darts at a board.

 

[RAMM]

Hah! $1,000 intake manifold...............should make 800 HP. You crack me up Jesse

No kidding! I obviously JUST had to see what this manifold could do-given the time I invested. I think half of 800hp should be within reach.

Here's a pic of the manifold before--ugh. J.Rob

 

[fratzog lover]

Never owned a small block Torker, but hear they make good doorstops.

 

[RAMM]

Never owned a small block Torker, but hear they make good doorstops.

Compared to an RPM AirGap I would have to agree; however, I believe this manifold can support the 415-420 hp and 420-430 tq I am shooting for. If 370 hp was made with a 4412 2bl then simply putting a 4bl on typically nets a 50-70 hp gain, then theoretically unported it could have topped 400hp easily. I really wish I had taken the 10 mins and tried a 4bl at that time. J.Rob

 

[Marcohotrod]

I say 410hp

 

[mini]

440Hp

 

[jerry6]

Should be 440 hp 6200 475 tq 4700, depending on how bad that dorker is

 

[540Valiant]

410 @6200! 400tq @ 5800

 

[Abodybomber]

HP425-430@ 63-400 RPM/Tq 400-410@ 3800-3900 rpm.

 

[stixx]

435@6200 hp / 425@4400 tq

 

[RAMM]

435@6200 hp / 425@4400 tq

This would be great. I figure 415-420 hp @ 5800 rpm/ 420-425 tq @ 4700 rpm. We should see by Saturday. J.Rob

 

[jerry6]

This would be great. I figure 415-420 hp @ 5800 rpm/ 420-425 tq @ 4700 rpm. We should see by Saturday. J.Rob

That cam should peak @ 6200+ rpm , I know I have the 262 and hp peaked @6200 , tq was I think @4600 could be wrong on torque , have to check the paper .

 

[Marcohotrod]

? comp ratio, quench, carb size, header size, windage tray, oil pan depth, oil, exhaust crossover ? what else have I forgot that U are not telling? 405-420hp

 

[RAMM]

? comp ratio, quench, carb size, header size, windage tray, oil pan depth, oil, exhaust crossover ? what else have I forgot that U are not telling? 405-420hp

Sorry--Forgot to state comp ratio--shooting for 10-1. No real quench considering the small full perimeter dish and still slightly open chamber. Carb will be either a 750 dbl or 3310 750 vac. No windage tray, stock truck pan with baffle as in picture above. Oil-Shell Rotella T 15w40. Exhaust crossover will remain for now. J.Rob

 

[jerry6]

I always thought the torker was a high performance intake , had one on my 440 and it was great , a bit of a dog around town , worked great full throttle . Was the small block torker something for a 318 ?

 

[RAMM]

I had to machine a dish in the piston to net a volume of -13cc to get the compression to the 10-1 mark. 3.25" diameter .050" deep did the trick. J.Rob

 

[RAMM]

Here it is all dressed up and ready for breakin and testing. J.Rob

 

[mguner]

Have you tried making a divider for the plenum? Add a 2" 4 hole spacer....

 

[RAMM]

Fired it up and verified timing, set distributor to 34 total and varied load and RPM for 15 mins. Other than the MadMax looking valvecovers leaking a little--all was well. I made a total of 11 tests and figured this would be fun engine to try all kinds of spacers on. Guess what? The engine repeated virtually identically everytime no matter what spacer configuration was on it. Total timing was best @36-37 and ultimately the 1/2" open spacer was the best. 426hp @ 5700-5800 rpm and 425 ft/lbs on the last and longest test where I began the test @3000-6000 rpm. Idle quality was nice and stable with 8-9" inches @750-800 rpm. Hot oil pressure was great @ 60 psi. Oil pressure built linearly and perfectly each pull. It was nice to see this pile of parts together and running this well. J.Rob

 

[RAMM]

Have you tried making a divider for the plenum? Add a 2" 4 hole spacer....

No and I wouldn't want to spend anymore time on this manifold. I tried a Wilson 1.5" tapered 4 hole--almost always shows healthy gains--not this time. J.Rob

 

[jerry6]

Nice, you did a good job on the torker . Do you think you would add much with an Air Gap ?