New engine
Thread Starter
Instructor
Joined: Apr 2013
Posts: 222
Likes: 3
From: Ottawa Ontario
New engine
Hey guys so some of you might have seen earlier, I'm a new member that had gotten a 96 procharged vette not running, turned out that the bottom end. Or at least my barrings were completely gone. So now its time to start thinking about what to do. I want to go forged, but I'm young and have to save for a while to get what I need. So.. I started looking into buying a new shortblock because here in Ottawa Canada it seems that most machine work is almost going to cost me half of a new shortblock. So I started looking for engine and found this:
http://www.summitracing.com/parts/hpe-sp33
and was wondering what you guys think, I read a lot of bad reviews about summit that have come up in the past couple months. Thats not a bad price for what I have found, but that could be iffy I guess. Just let me know what you guys think
Charles R
http://www.summitracing.com/parts/hpe-sp33
and was wondering what you guys think, I read a lot of bad reviews about summit that have come up in the past couple months. Thats not a bad price for what I have found, but that could be iffy I guess. Just let me know what you guys think
Charles R
Thread Starter
Instructor
Joined: Apr 2013
Posts: 222
Likes: 3
From: Ottawa Ontario
Im not sure about the compression, I was hoping to use stock heads with some work done to them? maybe that wouldn't be smart I don't know, and its just the procharged, msd, exhaust is all. Aswell as I was gonna ask what you guys thought would be a good cam combo as I would like it to sound aggressive.
Thread Starter
Instructor
Joined: Apr 2013
Posts: 222
Likes: 3
From: Ottawa Ontario
Alright, I need to call around and ask some local shops still, Because the one i was at said 1000$ to get the engine full apart and if needed machining it could be up to 2000$ for a full job, so right there that would be about the cost of the forged block from summit. I doubt my block got that messed up that it will need 2k worth of machining, But Im just worried like what if it does it'll end up costing me more in the long run. if i decided to go forged and get better heads any suggestions on a good type?
Thread Starter
Instructor
Joined: Apr 2013
Posts: 222
Likes: 3
From: Ottawa Ontario
Itll be mostly just street enjoyment. Id like to make around 400-500wheel, And might track it a couple times. but nothing nuts, It will be using the power out on the streets alot tho.
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Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
I disagree with some of the stuff above. If you are going to run a blower for what it cost, go forged on pistons, rods, and crank. When looking at the big picture, the cost is not that much more. There are some on here such as rklessdriver who can advise better, but I think with a 383 and a dished piston of -22cc. the stock heads are around 9.25 to 1 compression.
But you need to decide before building if a blower is the way you want to go. The cam selection, and compression are critical for this build based on blower or NA.
But you need to decide before building if a blower is the way you want to go. The cam selection, and compression are critical for this build based on blower or NA.
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39
Well, I would recommend porting and polishing the heads while they're off. When I had my Mustang, someone said they would do it for 700 bucks. But if you get an aggressive cam, it will be an uncomfortable idle, but will make power. If you want some cheap stuff, throw the engine together with what you have, and get an under drive pulley for the S/C and you'll push a few more PSI. The only thing you have to worry about now is if you trans and differential will hold up to the 500 rwhp that you want. Also, you may want to do some research as to how much power the motor mounts can hold up to. Good luck with this bad *** car!
Safety Car
Joined: Apr 2005
Posts: 3,624
Likes: 431
From: Dale City VA
You need to call ATK and ask what pistons they are using....
It says they are dished but it dosen't say how big the dish is so you have no clue how much compression it'll have.
With 54cc heads your going to need a BIG dish to get the compression ratio sutiable for reliable 500RWHP with a supercharger.
If you stay with the stock 3.48 stroke you'll need about -25cc dish to get 9.1SCR.
If you go with a 3.75 stroke (383) you'll need about -32cc dish piston to get 9.1SCR.
I don't know what a north of the border shop would charge but here a competent engine shop could build a comparable short block re-using your LTX block in the same price range and you'd be able to see what your buying 1st hand and talk face to face with man doing the work.
Will
It says they are dished but it dosen't say how big the dish is so you have no clue how much compression it'll have.
With 54cc heads your going to need a BIG dish to get the compression ratio sutiable for reliable 500RWHP with a supercharger.
If you stay with the stock 3.48 stroke you'll need about -25cc dish to get 9.1SCR.
If you go with a 3.75 stroke (383) you'll need about -32cc dish piston to get 9.1SCR.
I don't know what a north of the border shop would charge but here a competent engine shop could build a comparable short block re-using your LTX block in the same price range and you'd be able to see what your buying 1st hand and talk face to face with man doing the work.
Will
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
Send a pm to rklessdriver and ask his opinion. He knows motors and what works. FWIW depending on what machine work cost in your area, consider new AFR heads. I paid a little less then $2000.00 but they are 210's and flow 311cfm. You will never get stock heads to flow as well as the AFR's. In addition, you could go with a flat top piston and then reduce the compression with larger combustion chambers in the heads, which again, can be ordered as you want.
Thread Starter
Instructor
Joined: Apr 2013
Posts: 222
Likes: 3
From: Ottawa Ontario
You need to call ATK and ask what pistons they are using....
It says they are dished but it dosen't say how big the dish is so you have no clue how much compression it'll have.
With 54cc heads your going to need a BIG dish to get the compression ratio sutiable for reliable 500RWHP with a supercharger.
If you stay with the stock 3.48 stroke you'll need about -25cc dish to get 9.1SCR.
If you go with a 3.75 stroke (383) you'll need about -32cc dish piston to get 9.1SCR.
I don't know what a north of the border shop would charge but here a competent engine shop could build a comparable short block re-using your LTX block in the same price range and you'd be able to see what your buying 1st hand and talk face to face with man doing the work.
Will
It says they are dished but it dosen't say how big the dish is so you have no clue how much compression it'll have.
With 54cc heads your going to need a BIG dish to get the compression ratio sutiable for reliable 500RWHP with a supercharger.
If you stay with the stock 3.48 stroke you'll need about -25cc dish to get 9.1SCR.
If you go with a 3.75 stroke (383) you'll need about -32cc dish piston to get 9.1SCR.
I don't know what a north of the border shop would charge but here a competent engine shop could build a comparable short block re-using your LTX block in the same price range and you'd be able to see what your buying 1st hand and talk face to face with man doing the work.
Will
Soo best to do is call ATK and find out they're piston dishes, and if I wanted to run the 3.75 stroke 383 id need the pistons to be 32cc on stock heads ported and polished?
Safety Car
Joined: Apr 2005
Posts: 3,624
Likes: 431
From: Dale City VA
Yes the stock 96 heads have a 54cc chamber. A 32cc dished piston will give you 9.1 SCR. If the dish is less the compression will be higher.
Call ATK and find out what parts they are using. Ask to speak with Brandon as he is ATKs rep on many internet forums. 800.421.3746
Will
Call ATK and find out what parts they are using. Ask to speak with Brandon as he is ATKs rep on many internet forums. 800.421.3746
Will
Thread Starter
Instructor
Joined: Apr 2013
Posts: 222
Likes: 3
From: Ottawa Ontario
Any suggestions on builds and parts to build a nonboosted 500whp car? Aswell i was gonna ask, i havent called ATK yep, but will it be hard to find a rotary assembly needing 32cc dished pistons? Or will i have to looking into getting different piston sets
Thread Starter
Instructor
Joined: Apr 2013
Posts: 222
Likes: 3
From: Ottawa Ontario
Because i have also found forged rotation assemblys like
http://m.summitracing.com/parts/esp-14121030
Which is all forged, with a 3.75stroke and 32cc pistons with the stoxk heads to make my 9:1compression if that kit there seems like a good deal to anyone
http://m.summitracing.com/parts/esp-14121030
Which is all forged, with a 3.75stroke and 32cc pistons with the stoxk heads to make my 9:1compression if that kit there seems like a good deal to anyone
Safety Car
Joined: Apr 2005
Posts: 3,624
Likes: 431
From: Dale City VA
Do a search and Take a look at the engine I built for 93 ragtop.
463rwhp thru an automatic and 3000 stall.... a duplicate of that engine is probally 480ish behind a 6spd. Runs 11.0s at 125mph shifting itself at 5100rpm.... very smooth power delivery. Very docile idle and driveability. Runs on 93 octane no problem amd he does have a tune for e85 but at only 11.25 compression there is not much power to be had with e85.
I can make over 500 normally aspriated... but you wont want to drive it on the street. My personal 92 6spd is a perfect example... big cam, super loud, very tricky powerband. 4yrs of driving it and I wish I had the engine I built for 93 ragtop instead... I intend to detune my 92 next year because its no fun to have all that power and break stuff all the time.
Will
463rwhp thru an automatic and 3000 stall.... a duplicate of that engine is probally 480ish behind a 6spd. Runs 11.0s at 125mph shifting itself at 5100rpm.... very smooth power delivery. Very docile idle and driveability. Runs on 93 octane no problem amd he does have a tune for e85 but at only 11.25 compression there is not much power to be had with e85.
I can make over 500 normally aspriated... but you wont want to drive it on the street. My personal 92 6spd is a perfect example... big cam, super loud, very tricky powerband. 4yrs of driving it and I wish I had the engine I built for 93 ragtop instead... I intend to detune my 92 next year because its no fun to have all that power and break stuff all the time.
Will