Nick Serra wrote:Hey, welcome back! I thought you parted out the eclipse?
Nick Serra wrote:It's just higher octane
DSMu4ia wrote:Brad's car (guy that does my tuning) on e-85, old school 35r, t4 - .68 open, out of fuel, and without beefy valve springs.
DSMu4ia wrote:Yea, Brad Brooks.
Car should do 750whp on kill with the HTA35r, gain about 300-400rpm of spool. You can usually take 300-400 rpm off the spool time on a dynojet vs. the street, so he'll be coming very near the 4k range of spool, with a 9500rpm rev limit. NASTY COMBO.
Oh ya, 10.5:1 pistons.
g3ar5hift3r wrote:DSMu4ia wrote:Yea, Brad Brooks.
Car should do 750whp on kill with the HTA35r, gain about 300-400rpm of spool. You can usually take 300-400 rpm off the spool time on a dynojet vs. the street, so he'll be coming very near the 4k range of spool, with a 9500rpm rev limit. NASTY COMBO.
Oh ya, 10.5:1 pistons.
10.5:1 on 31psi?
DSMu4ia wrote:g3ar5hift3r wrote:DSMu4ia wrote:Domestic guys just run low compression with boost because they don't know any better.
fbirdformula wrote:i'm not so sure my block would hold together if i ran 11:1 .... i was gunna lower it to 9:1 and see... it'll have forged internals of course
fbirdformula wrote:11:1 on low boost would be teh equivilent of 9:1 on higher boost wouldnt it?
Rb25Cory wrote:Agreeded, if I was running that high of compression on pump gas I'd be way out of my turbo's efficiency range for it to even be fun. E85 would make this a different story however...
RSbeast wrote:DSMu4ia wrote:g3ar5hift3r wrote:DSMu4ia wrote:Domestic guys just run low compression with boost because they don't know any better.
Blanket statement. One of the fastest 10" tire Mustangs in the country is a high compression turbo car doing well over 1000HP.
Furthermore, and 11:1 + boost street car is fucking retarded, although you have access to E85; alot of others don't. Setups like that are race-gas only and the bottom ends are STOUT (although yes you can drive around lower in the timing maps out of boost if youre in a pinch). You're essentially tuning the car to run almost like a diesel with that much compression under boost.
I like the concept, but it's not widely used for reasons.
DSMu4ia wrote:
Of course it's a blanket statement. Just like 10 years ago 25psi was considered EXTREME BOOST, now you have production cars running nearly that much. Just because higher compression junk isn't more common, doesn't mean its a bad idea.
With the advancement in tuning in the past decade, such as standalones, widebands, knock sensors, dynos, etc, there shouldn't be any fear of running a high compression motor on pump gas even.
Would I run 11:1 on a 93 octane motor? No, of course not. There eventually becomes a point of no return. Oh, and btw, nothing wrong with low timing, boost makes alot more power anyways. hehe.
Couple years ago people thought 450-500whp on a 4g63 was the limits of pump gas and was PUSHING IT. Now you have handfuls of 600whp pump gas cars, some doing 140mph+ in the 1/4. Advances in parts, tuning, turbo technology, etc have helped to make this possible.
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