loss of power ?'s
Thread Starter
Teching In
Joined: Sep 2015
Posts: 5
Likes: 0
From: minneapolis, mn
loss of power ?'s so i had my car tuned at a shop and they came back with i have bad compression and i did a compression text and everything is fine i am just not getting enough power. so i took it to another place and the came back with i have a bad intake monifold i have a 1998 camaro ls1 headers, a big cam, air intake a mild tune and i just put the cam in and it is only dynoing at 340 to the rear wheels any thoughts?
so i had my car tuned at a shop and they came back with i have bad compression and i did a compression text and everything is fine i am just not getting enough power. so i took it to another place and the came back with i have a bad intake monifold i have a 1998 camaro ls1 headers, a big cam, air intake a mild tune and i just put the cam in and it is only dynoing at 340 to the rear wheels any thoughts?
If you have a bad intake manifold, I can only assume a vacuum leak, which could affect fueling. Also, no indication of how big the cam is unless it's in your sig and I can't see it on my phone.
60 HP cam only isn't bad.
what transmission? what cam? what intake manifold?
I don't know what is meant by "mild tune" unless you mean they left it insanely rich and stockish timing map and/or no running to redline where a big cam makes power. That could be as much as 20rwhp if the tune is crap.
I don't know what is meant by "mild tune" unless you mean they left it insanely rich and stockish timing map and/or no running to redline where a big cam makes power. That could be as much as 20rwhp if the tune is crap.
so i had my car tuned at a shop and they came back with i have bad compression and i did a compression text and everything is fine i am just not getting enough power. so i took it to another place and the came back with i have a bad intake monifold i have a 1998 camaro ls1 headers, a big cam, air intake a mild tune and i just put the cam in and it is only dynoing at 340 to the rear wheels any thoughts?
When my car was first put together it was a 98 LS1 bottom end with stock heads and ls1 intake, longtubes, and mail order tune with a Comp Cams 230/224 cam.
It made 325rwhp with the converter unlocked on a Dynojet. Spent months looking for "what was wrong" to no avail.
Added a Fast 90mm intake, udp, larger air filter, and a real tune and it made 349-369rwhp unlocked depending on the dyno day.
The point being we don't have enough information to say if you're in the ballpark or not much less help diagnose what could be wrong (if anything).
It made 325rwhp with the converter unlocked on a Dynojet. Spent months looking for "what was wrong" to no avail.
Added a Fast 90mm intake, udp, larger air filter, and a real tune and it made 349-369rwhp unlocked depending on the dyno day.
The point being we don't have enough information to say if you're in the ballpark or not much less help diagnose what could be wrong (if anything).
No mention of the trans either? 
A M6 is going to dyno higher than a power sucking auto... my Firehawk made 322 RWHP with long tubes and a tune everything else stock FWIW. You say it has a "mild tune"? Is it a half assed mail order tune or something? I'd get a real dyno tune for large cam change IMO for optimal results.
A M6 is going to dyno higher than a power sucking auto... my Firehawk made 322 RWHP with long tubes and a tune everything else stock FWIW. You say it has a "mild tune"? Is it a half assed mail order tune or something? I'd get a real dyno tune for large cam change IMO for optimal results. Thread Starter
Teching In
Joined: Sep 2015
Posts: 5
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From: minneapolis, mn
Well my budy has a srt8 charger and before the cam i could keep up with him he has 380rwhp and 425 to the crank and i could keep up with him and now i put the cam in and had it tuned i am at the same speen his is stock other thena tranny tune just doesnt make sense how i am still the same speen after i put a cam and a tune in it
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Well my budy has a srt8 charger and before the cam i could keep up with him he has 380rwhp and 425 to the crank and i could keep up with him and now i put the cam in and had it tuned i am at the same speen his is stock other thena tranny tune just doesnt make sense how i am still the same speen after i put a cam and a tune in it
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Well my budy has a srt8 charger and before the cam i could keep up with him he has 380rwhp and 425 to the crank and i could keep up with him and now i put the cam in and had it tuned i am at the same speen his is stock other thena tranny tune just doesnt make sense how i am still the same speen after i put a cam and a tune in it
Get what we are saying? Slow down. Use punctuation. Answer the questions people have asked. We will be happy to help.
If you installed a humongous cam and the tune is crap or you are shifting too early or have a ls1 intake (what did the shop mean by "bad intake"?) then it's not going to run worth dick.
A big cam is only good if it's in a good combo.
A big cam is only good if it's in a good combo.
no idea if this is your issue. after engine work my car was running but basically in limp mode , drove like a 4 cyl , what happened was a teeny tiny wire off the back of the intake sensor that goes to the computer broke throwing a code. i think low manifold pressure maybe. thats all i got! goodluck!
Thread Starter
Teching In
Joined: Sep 2015
Posts: 5
Likes: 0
From: minneapolis, mn
well he had his car dynoed and it was at 380 to the rear wheels. cam specs are 228/228 .60/.60 112 lsa. His charger is stock. i also have no check engine light on nothing at all which is weird.
So weve established that your friends charger is pretty quick
Any chance you can try and answer any of the questions people have asked you to better provide you help?
What intake? Can you check for a vacuum leak?
What cam shaft?
Who tuned it?
Manual or auto trans?
Need a lot more information to try and take a guess at whats wrong
Any chance you can try and answer any of the questions people have asked you to better provide you help?
What intake? Can you check for a vacuum leak?
What cam shaft?
Who tuned it?
Manual or auto trans?
Need a lot more information to try and take a guess at whats wrong
So now if you can answer:
What intake manifold (posting a picture of right behind the throttle body would be a big clue if you don't know if its a stock LS1 or a LS6 intake)
What trans do you have? Automatic or manual?
I repeat (because it's about the most important question), what transmission does the car have?
Has the car been dyno tuned with HP Tuners or EFI Live...or was it "tuned" with Hypertech, Bully Dog, Diablo, etc type hand held tuner which almost certainly is not capable of properly tuning a cammed LS1?
Can you post a print out of the dyno sheet? It could show valve float, power dips, or a severely early HP peak all of which could indicate a problem.
On The Tree
Joined: Oct 2010
Posts: 124
Likes: 2
From: Desert
Good news is that is actually a fairly mild cam and is not your problem.
So now if you can answer:
What intake manifold (posting a picture of right behind the throttle body would be a big clue if you don't know if its a stock LS1 or a LS6 intake)
What trans do you have? Automatic or manual?
I repeat (because it's about the most important question), what transmission does the car have?
Has the car been dyno tuned with HP Tuners or EFI Live...or was it "tuned" with Hypertech, Bully Dog, Diablo, etc type hand held tuner which almost certainly is not capable of properly tuning a cammed LS1?
Can you post a print out of the dyno sheet? It could show valve float, power dips, or a severely early HP peak all of which could indicate a problem.
So now if you can answer:
What intake manifold (posting a picture of right behind the throttle body would be a big clue if you don't know if its a stock LS1 or a LS6 intake)
What trans do you have? Automatic or manual?
I repeat (because it's about the most important question), what transmission does the car have?
Has the car been dyno tuned with HP Tuners or EFI Live...or was it "tuned" with Hypertech, Bully Dog, Diablo, etc type hand held tuner which almost certainly is not capable of properly tuning a cammed LS1?
Can you post a print out of the dyno sheet? It could show valve float, power dips, or a severely early HP peak all of which could indicate a problem.
11 Second Club
Joined: Mar 2012
Posts: 1,541
Likes: 15
From: South Florida
If it's performing the same, as the stock cam, yes, something is wrong. No need to even compare dyno #'s.
Maybe your pushrods are too long, or your valve springs are weak. Good luck man.
Maybe your pushrods are too long, or your valve springs are weak. Good luck man.
so i had my car tuned at a shop and they came back with i have bad compression and i did a compression text and everything is fine i am just not getting enough power. so i took it to another place and the came back with i have a bad intake monifold i have a 1998 camaro ls1 headers, a big cam, air intake a mild tune and i just put the cam in and it is only dynoing at 340 to the rear wheels any thoughts?
