hey guys, i picked up a setup from a friend. its a NA setup. 2L sleeved, 12.5:1 compression, ported head, etc. makes good power. i threw a 75shot to it for fun, and now im toying with the idea of throwing a turbo kit on it (sitting in a car that hasnt run for awhile).

basically, im posting for some opinions on how much this setup can take. cliff notes:

- 85mmx89 .. Golden Eagle Sleeves
- 4.7cc Forged pistons = about 12.5:1 compression
- will switch over to E85

how much boost/power can i safely go with this?

 

Just Throw a 150 shot on that thing

 

It's all in what you want. 13:1 has been done but the tune has to be spot on. If you really wanted turbo you could go to a thicker headgasket to lower it a lil. E85 will def help too. The most important thing will be the tune. What would be your HP goal?

 

yea i was hoping the E85 can help it make a little over 400. it is my daily. i would like to avoid taking the motor apart if possible for the thicker headgasket. i also know that the block was built with Wiseco forged pistons and Carillo-A rods. I'm unsure of the clearances though.

 

Ya I would just get the turbo kit on and take it to a tuner.. Your going to need alot more fuel tho so you are looking at something like 1000cc to 1200cc injectors and a good tune.

 

Talk to Muckman he has a high comp and e85 setup

 

ill give Muckman a PM. thanks. im debating either to do this, or jus build a low compresion stock sleeved, forged piston shortblock that i have laying around.

 

The knock threshold of Ethanol is incredible on top of its other properties. You wont have any trouble big power with that engine. I cant say how much exactly - alot. But I havent found the knock threshold on E85 yet...

 

Only thing I would be worried about is headgasket sealing with that big of a bore.. there isn't much material between the sleeves at this point and higher.cylinder pressures will destroy a gasket that thin.

 

Muckman, i didnt get a chance to PM u yet. thanks for contributing to this thread. are you using "pump" E85 or from the drum? with 12.5:1 compression and E85, r u referring to big power as in 500+?

wantboost , yes im awared of the headgasket, but im hoping the 85mm wouldnt be too problematic for low 400s. im also worried about the P2W clearances since it was built for a NA motor. i have no clue what the original builder speced the wiseco pistons to. Im also a little worried about the Carillo A rods. they are very light and used it alot of NA motors as well.

 

85mm is fine if everything else is good, by friend has been 85mmx89mm racing on the same engine for years. It saw 20k of street abuse at 600whp on e85 daily before being thrown into another car just for drag and has been making 685 now with over 70 dyno pulls and 50-100 passes, on eagle rods and still the same bearings when the motor was assembled in like 2007 lol

While I feel its pretty clear he is a special case, 85mm has been proven to be ok with a good tune and big power.

 

thats good to hear. any other high comp users out there?

 

i have a 12:5:1 81.5 turbo setup.
waiting for money for the dyno tune.

 

nice. stock sleeves? what fuel? and what size turbo?

 

yup, id1000cc on e85,and precision 5431 turbine t3 58/63

 

nice! any track times? ^

guys, so it seems that with a sleeved motor, higher compression is fine as long as E85 is used. im still debating on just leaving this NA motor as is and build a cheap stock sleeved motor with forged pistons.

any info on how reliable a stock sleeved - forged piston combo with E85 can be if pushed to about 450-500? been trying to dig out the info from googling and it seems rev limit might come into play with stock sleeves

 

It might last a day it might last 5 years. Mostly has to do with the tune but you are probably going to crack a sleeve eventually with anything close to your goals.

I would just do a refresh on your current motor with new rods and bearings. While its apart you can check your ptw and address if needed. A Rods are lightweight and not designed for high cylinder pressures. They don't list a hp rating for your rods but IIRC the PRO-A Super rods are good to around 500hp. If yours are the A and not the PRO AS then I def wouldn't risk it. I think you would be getting too close to max even with the PRO AS. You want an H or I Beam. The Crower H Beam is good to ~700hp and is $400. I have a set that are on their 3rd build and put through tons of abuse over 75k.

 

after researching, i believe they are the Pro-A's that are super light used in alot of aggressive NA motors. now i guess i wont be boosting this motor. it would be a waste to take it apart since nothing is wrong with it. its actually a fun setup .. roughly 230whp.

i guess ill have to do a budget block to use the turbo kit i have lying around. so 450-500whp with stock sleeves and E85 is still not to reliable even if the tune is more on the conservative side eh?

 

Anything making over 400hp Id consider additional cylinder support. We see some make ridiculous power on stock sleeves but most wont report back when they fail.

 

Keep an eye on your timing... You will most likely be lower than the low compression setups.

There is also no worries about "making sure your tune is spot on" with E85 either.. You will be fine lean or rich, so just shoot for somewhere in the middle.

 

Sorry, this is terrible advice...if you are going to tune it, do it correctly right?

To the OP, what cams are you running currently?

I did a 13.7 compression motor that was 86x89 and because of some Skunk2 Pro 3s and a 4 Piston Racing Ported cylinder head made in the upper 200s and was an animal. He does have HG sealing issues though.

With 85mm you should be fine...get some big cams if you can, and throw a 100 shot direct port DRY shot on that thing and have some fun! E85 and Nitrous are a blast!

 

Yup Ill be sure to watch timing, thanks! LOL worst advice ever darkhorizon.

 

wow. how much NA power did he make with setup? sounds like a really nice setup.

im running skunk2 Pro 2s right now. the 75shot wet single was really fun so im sure a 100shot direct would be even better, but right now, i want to make use of the turbo kit thats been laying in the garage for so long. kind of miss it

 

Im all for Nitrous, Turbo and E85

 

BIG cams will help alot..

Forget turbo, throw the jesus pee at it and call it a day.