Help me with my build
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 793
Likes: 1
Help me with my build
I am specing out my build for this winter and am looking for some input. My goal for the build is as close to 1000rwhp on pump gas and meth.
Here is what I have so far:
ERL Superdeck I (427 or 442, ERL says their sleeve design is fine for a 4.125 stroke and FI but I was looking for more input on this too. I was thinking that the extra cubes would help out with my power goal but dont want to sacrifice anything with the 4.125 stroke.)
Comp Ratio? (Was hoping to go as high as possible as I want to retain as much of out of boost performance as possible)
Wesco Forged Pistons
Compstar HD I-Beam Rods
Callies Dragonslayer Crank
Cam? (Any vendors want to spec me out a cam?)
PRC 285cc heads with titanium intake & SS exhaust valves or......?
Whipple 4.5L blower when becomes available
Fuel system is currently 2 Walbro 255's but considering upgrading to Aeromotive 340's if needed?
Here is what I have so far:
ERL Superdeck I (427 or 442, ERL says their sleeve design is fine for a 4.125 stroke and FI but I was looking for more input on this too. I was thinking that the extra cubes would help out with my power goal but dont want to sacrifice anything with the 4.125 stroke.)
Comp Ratio? (Was hoping to go as high as possible as I want to retain as much of out of boost performance as possible)
Wesco Forged Pistons
Compstar HD I-Beam Rods
Callies Dragonslayer Crank
Cam? (Any vendors want to spec me out a cam?)
PRC 285cc heads with titanium intake & SS exhaust valves or......?
Whipple 4.5L blower when becomes available
Fuel system is currently 2 Walbro 255's but considering upgrading to Aeromotive 340's if needed?
Last edited by Bad News; Dec 22, 2011 at 03:08 PM.
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
That 4.125" stroke is going to push your rings into the fire due to bad piston geometry. Not a good idea. 
I have yet to see a positive displacement setup make more than 8xxrwhp, so you might be bringing a knife to a gunfight there IMO. Yes even with the Whipple.
Arun is one of the baddest guys in this forum and has his Trick Flow heads that were worked over by Brian Tooley himself for sale. He ran 160 in the 1/4 with them.
You should be able to get away with 10:1 compression, but tuning it might be touchy.
I have yet to see a positive displacement setup make more than 8xxrwhp, so you might be bringing a knife to a gunfight there IMO. Yes even with the Whipple.
Arun is one of the baddest guys in this forum and has his Trick Flow heads that were worked over by Brian Tooley himself for sale. He ran 160 in the 1/4 with them.
You should be able to get away with 10:1 compression, but tuning it might be touchy.
Last edited by BLOWNBLUEZ06; Dec 6, 2011 at 09:44 PM.
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08
I like the selection of your internal engine parts. I'd re-think the idea of a PD blower and open your mind to the larger centri blowers. They are proven to make power and you won't have to deal with the heat issues associated with PD blowers. Also, ERL motors are great, but I don't see the need for such a big cubic inch (specifically a long stroke) for your goals in the FI world. I think anything from 370ish-416ish cubic inch with a YSi or F-series blower would meet your goals. These are just my opinions... 
Melting Slicks
Joined: Feb 2006
Posts: 2,163
Likes: 5
From: Houston
What is the hood setup going to look like on that 4.5L car? Isn't it very tall?
You are likely in uncharted territory trying to get a positive displacement lsx into the 1000rwhp range. That blower can likely do it, but the supporting parts need to be top notch as well. You might consider not using a "kit" and letting a good fabricator make the the intercooler, piping, etc.
The people doing good with PD blower have 4 valvles/cyl and turn more rpm.
Turbo or ysi would be the proven and easiest way to do it imo.
You are likely in uncharted territory trying to get a positive displacement lsx into the 1000rwhp range. That blower can likely do it, but the supporting parts need to be top notch as well. You might consider not using a "kit" and letting a good fabricator make the the intercooler, piping, etc.
The people doing good with PD blower have 4 valvles/cyl and turn more rpm.
Turbo or ysi would be the proven and easiest way to do it imo.
Former Vendor
Joined: Oct 2007
Posts: 2,032
Likes: 6
From: longview tx
the " eaiser" way would be the smaller CI motor with a YSI or other centri blower. stick with the 4.100 stroke. the 4.125 puts the piston pin a little high for high boost as was stating. it just makes for a bad combination for high boost. You are on the right track though "IF" your going to go big CI you have to have a big "L" blower. you will have so much motor to fill you need a big blower to fill it.
A YSI on a 377-402 CI motor, or even a LSX 427 would really be all you need. These have been proven sec cars with those setups.
You will need some more fuel to go to the level your wanting, atleast for safety.
Which ever way you go this thing is sounding like its going to be a BEAST for sure!!!!!!!!!!
keep us all posted!
A YSI on a 377-402 CI motor, or even a LSX 427 would really be all you need. These have been proven sec cars with those setups.
You will need some more fuel to go to the level your wanting, atleast for safety.
Which ever way you go this thing is sounding like its going to be a BEAST for sure!!!!!!!!!!
keep us all posted!
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 793
Likes: 1
I know 1000rwhp is uncharted territory for a positive displacement blower thats why I want to do it lol. Back when I started my TVS 2300 build everyone was saying that anything close to 700rwhp on stock cubes and stock bottom end was unlikely but I got there. I talked to the guys over at Whipple and they said that I could probably get 900rwhp out of there current 2.9L blower but I would need some pretty insane compression. They advised me to wait for the 4.5L and my power goal would not be hard at all. As far as displacement goes, after talking to a few more builders, a 4.125 stroke might be pushing it for high boost so ill probably stick with a standard 4" stroke. I don't see why to go with anything smaller than a 427, doesn't make since to sacrifice displacement especially if starting from scratch. The only thing I have not narrowed down yet is the comp ratio. Depending on who I ask it is between 9.0 and 10.5.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
Drifting
Joined: Oct 2006
Posts: 1,984
Likes: 16
From: Amityville New York
I am specing out my build for this winter and am looking for some input. My goal for the build is as close to 1000rwhp on pump gas and meth.
Here is what I have so far:
ERL Superdeck I (427 or 442, ERL says their sleeve design is fine for a 4.125 stroke and FI but I was looking for more input on this too. I was thinking that the extra cubes would help out with my power goal but dont want to sacrifice anything with the 4.125 stroke.)
Comp Ratio? (Was hoping to go as high as possible as I want to retain as much of out of boost performance as possible)
Wesco Forged Pistons
Callies I-Beam Rods
Callies Dragonslayer Crank
Cam? (Any vendors want to spec me out a cam?)
PRC 285cc heads with titanium intake & SS exhaust valves or......?
Whipple 4.5L blower when becomes available
Fuel system is currently 2 Walbro 255's but considering upgrading to Aeromotive 340's if needed?
Here is what I have so far:
ERL Superdeck I (427 or 442, ERL says their sleeve design is fine for a 4.125 stroke and FI but I was looking for more input on this too. I was thinking that the extra cubes would help out with my power goal but dont want to sacrifice anything with the 4.125 stroke.)
Comp Ratio? (Was hoping to go as high as possible as I want to retain as much of out of boost performance as possible)
Wesco Forged Pistons
Callies I-Beam Rods
Callies Dragonslayer Crank
Cam? (Any vendors want to spec me out a cam?)
PRC 285cc heads with titanium intake & SS exhaust valves or......?
Whipple 4.5L blower when becomes available
Fuel system is currently 2 Walbro 255's but considering upgrading to Aeromotive 340's if needed?
Did you get the block done to accommodate the 6 bolts per cylinder, if so why not get a set of Mask Motorsports Heads with the valvetrain.
Piston can be Diamond, they are as good as many and better than any.
Former Vendor
Joined: Oct 2007
Posts: 2,032
Likes: 6
From: longview tx
I know 1000rwhp is uncharted territory for a positive displacement blower thats why I want to do it lol. Back when I started my TVS 2300 build everyone was saying that anything close to 700rwhp on stock cubes and stock bottom end was unlikely but I got there. I talked to the guys over at Whipple and they said that I could probably get 900rwhp out of there current 2.9L blower but I would need some pretty insane compression. They advised me to wait for the 4.5L and my power goal would not be hard at all. As far as displacement goes, after talking to a few more builders, a 4.125 stroke might be pushing it for high boost so ill probably stick with a standard 4" stroke. I don't see why to go with anything smaller than a 427, doesn't make since to sacrifice displacement especially if starting from scratch. The only thing I have not narrowed down yet is the comp ratio. Depending on who I ask it is between 9.0 and 10.5.
you wont need ungodly compression with that cause the blower will be able to push enough. i would do 9.5-10.0 comp.
make sure of course your getting a block with 6 bolt. LSX is your cheaper bet on that and are just fine for what your wanting to do
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 793
Likes: 1
Callies H-Beam rods are only rated for 900HP while their I-Beam's are rated for 1500HP so im not sure why I whould downgrade. The block will be a 6-bolt setup with 1/2" head studs. I considered Diamond pistons but after comparing them to Wesco's didnt find much of an advantage/difference. I have thought about the Mast heads but they are pricy. What does everyone think of Texas Speed's PCR 285cc heads? As far as the compression goes I guess the questionis how high can you go with 18-20 lbs of boost on pump gas with methanol?
Safety Car
Joined: May 2006
Posts: 4,016
Likes: 93
From: St. Louis, MO
Tech Contributor
427 on 93 and meth would probably be best in the mid 9s for static compression. I'm at 9.4 SCR (6.98 DCR) and it runs great on just 93 at 15-16psi. I'm not comfortable going higher without meth though. 20psi on meth with that displacement should be good for 1000whp.
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 793
Likes: 1
Ya I was considering them but havent heard from anyone with first hand expierance. Is there anything else in the same price range that compares? Looks like they would be about $3k set up the way I want.
Melting Slicks
Joined: Feb 2006
Posts: 3,191
Likes: 43
From: Scottsdale Az
As far as displacement goes, after talking to a few more builders, a 4.125 stroke might be pushing it for high boost so ill probably stick with a standard 4" stroke. I don't see why to go with anything smaller than a 427, doesn't make since to sacrifice displacement especially if starting from scratch. The only thing I have not narrowed down yet is the comp ratio. Depending on who I ask it is between 9.0 and 10.5.
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 793
Likes: 1
I will for sure. I am not sure what I am going to do for fuel yet. Either swap them out for the Aeromotive's or add another Walbro.