HoLLo

iTrader: (17)

Right, I see AFR's site only has the 230, but other retailers still have the 225's available. Would there be any actual low end loss (in the 225s vs 215s) under boost? I want a usable powerband, and don't plan to rev to the moon, maybe 6700 TOPS. That's what I rev to now on a stock motor.

It's a beautiful piece. I may try it myself, I've got a bunch of Dremel bits that need to get put to work. There's another guy that does them with a wire mesh. These things seriously make me thing heavier about getting a FMIC.. I just don't want a big open gap there. I don't care for fog lights that much, so that's not an issue.

Detoxx03

iTrader: (14)

Solid build. I would definitely go with a FMIC and meth but you're on the right track.

Detoxx03

iTrader: (14)

I think you could also have the compression in the 9.8-10.2 range. The heads are really not needed but it will make the setup a little more efficient. What pulley are you planning on running?

TA6spdRDC

iTrader: (2)

They make brackets for a FMIC so you don't have to cut anything. Ive also been thinking of going boost. But damn i love how my car is a monster on spray.

TheLS1Lover

I don't forsee any low end loss with the 215s vs the 225/30s no. Unless you plan on going with 370+ cubes I would go with the 215s.

LS6427

iTrader: (2)

From what I've learned..been told........compression is meaningless. Its the detonation thats the problem. So with cooler burning E85 you can start off with a higher compression engine and hit it with the same amount of boost as you would a lower compression engine.....and keep it from detonating. Adding an intercooler would just make things even better on top of the E85.

But the higher starting (N/A) compression engine....the faster the turbo will spool down low....which is what I want. I also have the 390ci (AES).....so its got plenty of cubes to keep a big 88mm or 91mm turbo spooling in the mid-upper rpm ranges.....but I wanted very little to zero lag down low. So with my 390ci I'll have 10.3:1 - 10.5:1 compression and using full time E85. I shouldn't have lag down low and I plan to go 18psi to make a little over 1,000 RWHP.

No meth, just a FMIC or the small side intercoolers that go under the front corners of the front bumper. A FMIC with water misters mounted to the front would be good too. That would drop charge temps a lot right before and during a hard run......

.

TheLS1Lover

When running higher compression you have a smaller tuning window, cold plugs, E85 (or equivaltent), and a good tuner are needed. I'd build something in the 10.5:1 range and run E85.

HoLLo

iTrader: (17)

Thanks for the input, keep it coming guys! The more feedback the better...

Like I said, I don't believe E85 is going to be an option right now. I'm in the military, and around my base, they have a lot of E85, but my hometown has VERY FEW, and I can't get stuck without fuel. I WILL, however, have an E85 compatible fuel system so I will have the option in the future, should I decide.

With the D1SC, I won't have to worry about how compression will affect spool. So, for 93 pump gas SCR, around a 10.0:1 should be safe with some cold plugs and proper tune?

Bob@BruteSpeed

iTrader: (16)

Since you're not planning on running E85, I would shoot for a 9.5/1 compression ratio. 10.0/1 could be used, but I'd go with methanol injection and you may find you have to pull a little more timing out of the tune if you're running a lot of boost. If you're going to run a lot of boost or your future plans might go for a bigger blower and more boost, I'd go with the 225 or 230 heads over the 215's. Bob

HoLLo

iTrader: (17)

Thanks again Bob. I spoke with you on the phone last week, thanks for steering me in the right direction. I will be giving you a call when it's time to place the order!

Sounds like a stock gasket thickness, 72cc head, and -3.2cc pistons will put me where I want to be. It's going to be tough deciding 215s or 225/230 heads.

5w20

iTrader: (21)

Listen to Bob and do the AFR 230 over the AFR 215. There isn't a good reason not to.

Straight 93 do ~9.5:1 compression
93 + meth shoot for ~10.5:1 compression
E85 shoot for ~11.5:1 compression

In order to take full advantage of E85, you need the high compression.

Bob@BruteSpeed

iTrader: (16)

You're welcome, I thought I had talked to you. Bob

CaliboyTA

iTrader: (2)

any updates on ur setup. I like your idea of keeping your car stock appearance and trying to make it stealthy. I've been looking for a setup for my car that will give me the best of both worlds. Street friendly and comfortable while being a beast when it wants to. Seems like you and I are thinking similarly. Another option to get high hp with stock appearance is going with the modular twin turbo kit.

My2kz28

iTrader: (1)

I ran an FMIC on my LT1 trans am, and only removed the fog lamps...cut nothing on the bumper and my IAT's were only 10 degrees above ambient

sscamaroburn02

iTrader: (14)

I'd go with the AFR 230's. You know down the road you'll want more power.

HoLLo

iTrader: (17)

Still getting parts list together and planning things out. I won't start buying everything until Spring time. I definitely want it to look as stock "as possible". I like sleeper effect.

That's not bad at all. LT1 T/As are even worse because there's nothing to go by, you just have to cut and hope it looks good.

That's for damn sure. I'll always want to crank it up. I'd hate to kick myself in the *** for not getting the better head to begin with. I gotta buy a new clutch now too. I should have gotten the higher up clutch to begin with.

vmapper

iTrader: (8)

I like your build, Ive calculated your SCR a few times, and I come up with 9.23
Dynamic 6.79:1.
-Using the LS9 (4.1" bore gasket)

The Alchemist

iTrader: (19)

Going with a procharger and 'stealth' don't go together. Trust me, there's no hiding a procharger.

6D9 Matt

LOL kinda what I was thinking.

Nice build... keep us updated!

2000RATA

Stealth is cool.