357ci HP Estimations
That's all I'm saying.
Thread Starter
Teching In
Joined: Nov 2012
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From: Dexter, Oregon
@RamAir95TA: The thing is we never planned on making that kind of horsepower, this originally was just going to be a heads, intake, mild cam engine with a freshened up bottom end, but as we started pulling the engine apart, it became apparent that it was going to need some machine work. One thing lead to another and between keeping it unique, using the parts we already had purchased and wanting to turn more rpms, we ended up with what ive posted, and figured out we might end up in the ball park of 450rwhp, but we'll see here in the next few months what it'll do 
Also just had a talk with my engine builder about quench and said he's shooting for .037
Also just had a talk with my engine builder about quench and said he's shooting for .037
the thing is you post a completely made up hope of 450hp and the next goober decides on a little more cam and posts he will make 470 and so on when the parts might make 410 mbut wont even run a number to back that up........................
Thread Starter
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Joined: Nov 2012
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From: Dexter, Oregon
Well you made me look for half an hour but here you go:
https://ls1tech.com/forums/lt1-lt4-modifications/1449142-357-hyd-roller-dart-t4p-heads-supervic-dyno-results.html
Although it has a different intake and maybe bigger heads, it's same cubic inches, smaller cam, less compression and he's still running an a/c compressor. What more do you want?
Edit: I also agree. I'm not here just to spew unachievable numbers that ill never reach, or argue over the difference of 30 hp, nobody likes people like that. If I'm wrong about the numbers, i'll own up to it and make things right, but saying I'm making up numbers off of pure hope? I don't play that game; I didn't make this thread to argue over that.
https://ls1tech.com/forums/lt1-lt4-modifications/1449142-357-hyd-roller-dart-t4p-heads-supervic-dyno-results.html
Although it has a different intake and maybe bigger heads, it's same cubic inches, smaller cam, less compression and he's still running an a/c compressor. What more do you want?
Edit: I also agree. I'm not here just to spew unachievable numbers that ill never reach, or argue over the difference of 30 hp, nobody likes people like that. If I'm wrong about the numbers, i'll own up to it and make things right, but saying I'm making up numbers off of pure hope? I don't play that game; I didn't make this thread to argue over that.
Last edited by 4genPhoenix; Apr 6, 2013 at 05:51 PM.
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Thread Starter
Teching In
Joined: Nov 2012
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From: Dexter, Oregon
While I like you're thinking, if I went that route we would already have a 1st gen dart small block in it.
We dont have a real horsepower goal set, it will just be what it is, but we do have a quarter mile goal set, breaking into 11's and work from there.
My last years time on the stock LT1 long block with 103k on it got to go 13.09 @ just under 106 with 296rwhp 324rwtq. (I have video of the run)
We dont have a real horsepower goal set, it will just be what it is, but we do have a quarter mile goal set, breaking into 11's and work from there.
My last years time on the stock LT1 long block with 103k on it got to go 13.09 @ just under 106 with 296rwhp 324rwtq. (I have video of the run)
did you really just post an example with COMPLETELY different heads and intake?
I could post an example of GM castings heads and intake ported somewhere else on a 355 with a solid roller making 500wrhp, but being solid roller is not a valid comparison
I could post an example of GM castings heads and intake ported somewhere else on a 355 with a solid roller making 500wrhp, but being solid roller is not a valid comparison
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Joined: Jan 2013
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From: Las Vegas
HP per C.I. Just a rule of thumb, 1.2 times the number of cubic inches would be very good hp for any steet motor. 357ci x 1.2 = 428hp. Most street builds end up less than 1.1hp per ci. And most stock engines are <1hp per ci.
cardo
cardo
No way you'll be anywhere near 450 at wheels. I have a 355 with Ai heads and a 236 cam and it consistently puts out 411-413rwhp every time it's dynod. Do a 383. I'm really pissed I didn't do that to begin with because like you I wanted very good reliability and love running high RPM's. I redline my car every time I drive it. None of that matters with a blower obviously though haha.
Thread Starter
Teching In
Joined: Nov 2012
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From: Dexter, Oregon
I've finally put my nose to the grind stone, and you guys are right. I really need to apologize for being difficult, especially to 96capricemgr 
There was a lot more research I should have done before I said what I did, it just didn't seem that difficult at the time to imagine reaching numbers like that on a smaller stoke with these heads, and I'm a stubborn guy, so when 96capricemgr started getting on my case, I felt I needed to stick to my guns.
I like this forum, there are a lot of knowledgeable people here. I hope you guys wont hold this against me
I have a more realistic idea of what it might put down now, but I think ill keep that to myself till I have the real numbers to prove it
P.S: Thank you cardo0 for reminding me of the hp/ci scale. That helped us realize other factors and that those numbers were too high to expect with what's going on the engine.
There was a lot more research I should have done before I said what I did, it just didn't seem that difficult at the time to imagine reaching numbers like that on a smaller stoke with these heads, and I'm a stubborn guy, so when 96capricemgr started getting on my case, I felt I needed to stick to my guns.I like this forum, there are a lot of knowledgeable people here. I hope you guys wont hold this against me
I have a more realistic idea of what it might put down now, but I think ill keep that to myself till I have the real numbers to prove it
P.S: Thank you cardo0 for reminding me of the hp/ci scale. That helped us realize other factors and that those numbers were too high to expect with what's going on the engine.
Thread Starter
Teching In
Joined: Nov 2012
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From: Dexter, Oregon
If it bugs us enough yea lol, but this car is going to be bracket racing for the most part. It would be a great way to make up time if I were to have a bad launch or miss a gear, but unless it runs a 12.0000001 or I cant get the damn thing into gear, ill be content with it.
On the other hand, in a grudge match situation, some laughing gas would probably blow someones socks off, "Huh, my car? Not a whole lot done other than a cam, still has factory heads and intake"
On the other hand, in a grudge match situation, some laughing gas would probably blow someones socks off, "Huh, my car? Not a whole lot done other than a cam, still has factory heads and intake"
Last edited by 4genPhoenix; Apr 7, 2013 at 08:35 PM.
