Blown alcohol small block?

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Cope

Cope

Fusing with fire
Joined
Oct 20, 2009
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I hardly ever drive my car now so why now burn 100 bucks to drive my girl around?

Do i drink the koolaid and just go blown injected?

Or do i stop now and stay sane with the blown pump gas mil...
 
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Gas is easer than all the alcohol maintenance,my two cents
 
Having to drain the fuel out every time you drive it... it seems like on the street it would just fry the tires that much harder..
I think the traction problems are going to be big enough with just gas...my-2...
 
We don’t have e85 around here I have no experience with it ,sorry
 
Biff said:
We don’t have e85 around here I have no experience with it ,sorry
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My only experience was one friend of mine running it and having to call one of his workers to go pick up a 5-gallon can so he could get home..
 
Cope said:
What about E85 in the system?
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I use e85 in my car, works great. With the cooling properties, high octane, and low cost, it sounds perfect for boosted motors. The only real maintenance issues I have is you can't let the car sit for weeks on end (the fuel absorbs water out of the air quickly). On my carbs, the little check valve under the squirters (looks like a silver bullet) gets stuck if it sits too long...its an easy fix, just remove the squirter and shoot a little WD-40 in there...no biggie.
 
More just asking because wanting to follow. What kind of small block are you considering putting boost on and what kind of supercharger? If your going through the trouble, I see more reasons to go with a big block than a small block from a strength standpoint. But nothing wrong at all with the any type of street Mopar running blown on alcohol. I would love to see one these of LA four cylinder drag race LA W9 engines with full on turbo alcohol electronic Frankenstein treatment in an early A body. LA-based four cylinder racing engine
 
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I just want to say that I am happy you are even considering this. If I pulled up next to a blown injected small block dart on alcohol on the street it would just make me happy.
 
I have a 6-71 set up at 7 psi going on a all out 408 build.

Was gonna run pump gas at low comp (8-1) but now thinking 13-1 on E85 Would be fun until the block lets go....
 
Go e85, we have the pro e85 guys at great lakes dragaway and they run in the 8.90 index and drive on the street a lot of them have blowers/ nitrous.
 
The Bigger Hammer principal on a thermonuclear scale, I am already in love with it. Just plan on buying your fuel by the drum instead of from the pump. Aluminum rods and o ringed copper head gaskets with a skim coat of Hylomar may not be bad idea. People may say that a certain combination is like driving an alcohol funny car on the street. 13:1 with roots boost on ethanol is actually driving an alcohol funny car on the street, or at least it's close enough for me.
 
I do have a nice wheelie bar just collecting dust in the rafters... could be a good excuse to get that out of the shop.

I know two guys running blown alky mopar race cars and the dang enines last a long time. They say alky is easy on the mill. Untill its not...
 
Cope said:
I have a 6-71 set up at 7 psi going on a all out 408 build.

Was gonna run pump gas at low comp (8-1) but now thinking 13-1 on E85 Would be fun until the block lets go....
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If you push it hard it shouldn't take to long to find the limit of your block.
 
The stock 360 block approaches its limits with aftermarket caps and studs in the neighborhood of 550hp. Methanol or e98 would be capable of exceeding that by at least 250 percent. But it’d be fun while it lasted. Grout the block to the bottom of the block to the bottom of the water pump openings, set the ring gaps 10% past air cooled spec, bolt a girdle onto it, and put a diaper on to keep your tires out of the impending oil slick. Or at the very least an engine diaper. Nothing like oiling down the rear tires at 100 plus with the tires still spinning under power.
 
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I’m wagering the first time it gets into hard detonation with steel rods, it’s history. But wow, what a ride...
 
550? Wow thats not much. I was hoping i could get 650 or so out of it. For some reason i thought their limit was much closer to 7 or 800.

Thats kinda a bummer...

Im definitely going to be north of 550HP, I didn't spend all this money to make what a NA Chevy dose. I told my engine builder if it comes in under 650 i will not be happy and that was my number on pump gas. I guess there's really no reason to spend the money on injection if im that hamstrung by the block.

Thanks for the advice!
 
Cope said:
550? Wow thats not much. I was hoping i could get 650 or so out of it. For some reason i thought their limit was much closer to 7 or 800.

Thats kinda a bummer...

Im definitely going to be north of 550HP, I didn't spend all this money to make what a NA Chevy dose. I told my engine builder if it comes in under 650 i will not be happy and that was my number on pump gas. I guess there's really no reason to spend the money on injection if im that hamstrung by the block.

Thanks for the advice!
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At 500 HP N/A you are asking the block to do things it can't. You'll need studs, you should have better main caps, you have to run way more oil clearance than you should because the main line goes oval. The bores move all over and ring seal goes to hell right quick.

The decks are so thin it's almost impossible to seal the head gaskets. The main webs are too thin and the tend to fracture at the oil feed hole up the the cam bearings. That's telling you the block is spreading.

Many guys get by with a stock block. But they are giving up power because of all the issues noted above.
 
Stick, I believe what Garrett meant was on methanol you would potentially make 250% more power than the block is currently capable of supporting. Please correct me if I’m wrong.
 
YR, do you see any measurable difference in the strength of magnum vs LA blocks?
 
Correct on the fuel (especially methanol, but within reach with enough boost on e98) being able to produce that much power, given you have a strong enough vessel to contain the pressure. It’s not just the extra volume of fuel that you burn to a given amount of air or oxidizer. It’s the longer burn time making power for more degrees of crankshaft rotation during the power stroke. The going rate for top alcohol classes on the drag strip is approaching 3500 horsepower. Not bad for 500 or so cubic inches. A good place for a sleeved cold weather 400 block with grout and BCR cap and girdle system.
 
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