383ci making 340whp - advices needed
#44
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I didn't dyno it - previous owner told me this. And all I wrote about the engine internals is from his words.
I only measured ET and 1/4 mph with GTech, got 110mph - the same that previous owner told me
Yepp I put nitrous kit on it but didn't have a chance to set it up yet.
Still I'd like to get a bit more NA power
reading that PatrickG got 500whp out of 11:1 CR 347ci, I think that 340whp out of 9.2:1 383ci is pathetic
I only measured ET and 1/4 mph with GTech, got 110mph - the same that previous owner told me
Yepp I put nitrous kit on it but didn't have a chance to set it up yet.
Still I'd like to get a bit more NA power
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
#45
TECH Addict
iTrader: (6)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
its easy to put 400rwhp with an ls1 and even more with a 383. The PROBLEM has already been told to you by these guys;low comp,bad cam n/a,tune.
So its up to you to choose between staying n/a or waiting for the turbo. Dont waste your cash with an intake, LS6 is the best choice for $$$ to stay in your pocket and for boost too.
Cam, tune and NOS is the best for you now. And swapping the heads if you want to get that CR.
500rwhp with a 347 will cost a lot: AFR heads 2000$++, a ported FAST 90mm intake 1000$++, 90mm TB 400$,the right cam400$,tune 550$,electric water pump500$,Pulleys 250$,85mm MAF 200$?,the best exhaust $$$$,rockers 380$,clutch$$$, and other supporting mods....
good luck
So its up to you to choose between staying n/a or waiting for the turbo. Dont waste your cash with an intake, LS6 is the best choice for $$$ to stay in your pocket and for boost too.
Cam, tune and NOS is the best for you now. And swapping the heads if you want to get that CR.
500rwhp with a 347 will cost a lot: AFR heads 2000$++, a ported FAST 90mm intake 1000$++, 90mm TB 400$,the right cam400$,tune 550$,electric water pump500$,Pulleys 250$,85mm MAF 200$?,the best exhaust $$$$,rockers 380$,clutch$$$, and other supporting mods....
good luck
#47
TECH Junkie
iTrader: (4)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
your problem lies in the tuning. nothing more. that engine should produce ~385 whp n/a with that setup PROPERLY TUNED. find a GOOD tuner to spend your money on. the cam and everything else is fine, just get someone who knows what they're doing to start tweaking the computer side of it.
#48
TECH Regular
iTrader: (1)
Join Date: Aug 2006
Location: Mi
Posts: 491
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
It sounds like your working on a restricted budget and are saving for the turbo kit. Why waste your money on a temporary set up which will just deplete your funds. If I were you I would just put on a 150 shot of nitrous which will wake up your motor nicely and will not break the bank. That way there is no other major cost involed other than having the turbo installed once purchased.
If you want to go the H/C and piston Route then don't make it a half *** project...just dump the turbo set up and move on!!
If you want to go the H/C and piston Route then don't make it a half *** project...just dump the turbo set up and move on!!
![Nod](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_nod.gif)
#49
12 Second Club
iTrader: (116)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
For one a new decent cam is gonna be in the $300 neighborhood alone. then a head change could ring in another $1200. Plus gaskets. And thats if he keeps the pistons that are already in it. If not then there is another $500 or more for pistons.
Sure he can sell the parts that are in the motor now & make back some money but he will still be out more than $500 to get where he wants it to be.
And for the record you don't have to have a 112 LSA to make power in a N/A set-up.
#51
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
your problem lies in the tuning. nothing more. that engine should produce ~385 whp n/a with that setup PROPERLY TUNED. find a GOOD tuner to spend your money on. the cam and everything else is fine, just get someone who knows what they're doing to start tweaking the computer side of it.
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
I'll tune it myself as soon as I get some of the sponsors to ship me HP Tuners over here
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
Why waste your money on a temporary set up which will just deplete your funds. If I were you I would just put on a 150 shot of nitrous which will wake up your motor nicely and will not break the bank. That way there is no other major cost involed other than having the turbo installed once purchased.
If you want to go the H/C and piston Route then don't make it a half *** project...just dump the turbo set up and move on!!![Nod](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_nod.gif)
If you want to go the H/C and piston Route then don't make it a half *** project...just dump the turbo set up and move on!!
![Nod](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_nod.gif)
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
No, I will not change heads and pistons.
Another reason why I want it to make a bit more HP is because in one of the events here we have separate NA class, and I'd like to compete in it
#52
TECH Regular
iTrader: (1)
Join Date: Aug 2006
Location: Mi
Posts: 491
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
With that low off a compression ratio a much "bigger" cam will not produce the HP/TQ numbers normally associated with a nice cam swap. Also, is your car a M6 or A4 and what gear are you running? If it's a M6 you probably need a bigger gear - A4 a bigger stall and a bigger gear. Like I said in my previous post - don't do a half *** project it's a waste of time and money. Either commit to the turbo set up or the NA set up, and do the project right. Just my 2 cents.
#54
TECH Apprentice
iTrader: (3)
Join Date: Aug 2005
Location: Hot Springs, AR
Posts: 327
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
IMO, if you already have the N2O, get it set up properly and use that until you get the turbo. Don't waste your money if you're just going to go back to what you have now.
As for PatrickG...he used the best of the best, and spent lots of money to do it. Also, a good tune would help out a lot. If you do decide to get a new cam, I would get Patrick to spec you out one for $25 and then $389 from Thunder Racing for the cam.
As for PatrickG...he used the best of the best, and spent lots of money to do it. Also, a good tune would help out a lot. If you do decide to get a new cam, I would get Patrick to spec you out one for $25 and then $389 from Thunder Racing for the cam.
#55
Staging Lane
Join Date: Dec 2003
Location: Nortern Idaho
Posts: 99
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
your problem lies in the tuning. nothing more. that engine should produce ~385 whp n/a with that setup PROPERLY TUNED. find a GOOD tuner to spend your money on. the cam and everything else is fine, just get someone who knows what they're doing to start tweaking the computer side of it.
running. Possibly the previous owner had a TURBO tune anticipating a turbo
and the timing is low. You probably need to bump the timing up to 27-28*
![Grin](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_grin.gif)
#56
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I also hope that problem lies in tune (car doesn't even idle after cold start, so tune really may be less than ideal) ![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
camaro_fanatic, I know PatrickG is using best parts and a lot of experience, but he's getting 1.45whp per ci, I have 0.92whp per ci. The difference is dramatic
and there should be other reasons for that, other than best parts and 2.5 point lower compression ratio
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
camaro_fanatic, I know PatrickG is using best parts and a lot of experience, but he's getting 1.45whp per ci, I have 0.92whp per ci. The difference is dramatic
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
#57
TECH Fanatic
iTrader: (8)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Forget about the cam idea, it's a waste of money without changing everything else. Going to a mid 230s duration cam like most are recommending is a big mistake on that engine. You simply cannot throw a large cam in a low compression engine and expect it to work. You may see an increase in power with a mid-high 220 duration cam, but the gain you see won't be worth the cost. Basically, either keep it the way it is and wait until you can turbo it, or change the whole top end to make the naturally aspirated power you see other people making with properly matched setups. And good luck tuning on your own with that BBK throttle body.
#58
TECH Senior Member
iTrader: (8)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Forget about the cam idea, it's a waste of money without changing everything else. Going to a mid 230s duration cam like most are recommending is a big mistake on that engine. You simply cannot throw a large cam in a low compression engine and expect it to work. You may see an increase in power with a mid-high 220 duration cam, but the gain you see won't be worth the cost. Basically, either keep it the way it is and wait until you can turbo it, or change the whole top end to make the naturally aspirated power you see other people making with properly matched setups. And good luck tuning on your own with that BBK throttle body.
Ditto that^^^^^^^^ I would see what else you can get with tuning. Low compression will keep you from making good numbers until the turbo goes on.