LETHAL / PRC LS7 heads / boltons / nitrous dyno numbers (Help)
#1
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Hey guys !!! ![Winky](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_wink.gif)
I need some help here please.
Couple of months ago a friend of mine dynoed his C6 ZO6 with these mods:
AR 1.7/8 Headers with Off road X-pipe.
Stock catback.
Fast 102mm Intake (unported)
NW 102mm TB.
K&N CAI.
QM550 camshaft. (great cam with stock idle and awesome drivability)
PRC LS7 Heads ported from TSP milled to 68cc.
Spec stg 3+ clutch and aluminum flywheel.
Tune of course.
The car made 545rwhp 510rwtq with great mid range HP/TQ
![](http://i112.photobucket.com/albums/n181/venomws6/dynoQM550.jpg)
After couple of months the owner wanted another 20-30rwhp N/A and 200+shot so I talked to Trevor@TSP and since the owner didnt want the LSX Block for the weight I orederd TSP forged LS7 427ci since Trevor told it will handle the 250shot with the right tune and fuel.
I also ordered Nitrous Outlet plate system from TSP.
(BTW I recommend TSP for everyone I'm always happy when dealing with them and I'm overseas) thanks guys![Hail](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_hail.gif)
He also changed the QM550 for RAGIN RACIN Lethal since we always seen great results from it.
Thanks for the fast shipping Shawn![Mr. Cool](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_cool.gif)
Now for the dyno time same mods above but with stock TB and changed K&N CAI to the new Halltech Killerbee II....
The car only made 536rwhp 500rwtq N/A![Sad](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_sad.gif)
Then added 103VP racing fuel for the nitrous
150shot 673rwhp 657rwtq
200shot 744rwhp 773rwtq I love the TQ![Icon Eek](https://ls1tech.com/forums/images/smilies2/icon_eek.gif)
A/F Ratio is perfect at 12.8 for the N/A runs and 11.5 - 11.8 for the nitrous.
N/A
![](http://i112.photobucket.com/albums/n181/venomws6/dynoLethal.jpg)
150shot
![](http://i112.photobucket.com/albums/n181/venomws6/dyno150shot.jpg)
200shot
![](http://i112.photobucket.com/albums/n181/venomws6/dyno200shot.jpg)
Keep in mind guys all the N/A runs were on 90-91octane pump gas and 90 - 95 F whether The nitrous numbers were great but N/A were not that good we thought with the bigger cam and better CAI the car will gain 20-30rwhp![Cry](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_cry.gif)
I already ordered B&B Fusion catback and will also order LMR 102mm TB
Hoping to see 560+rwhp .
BTW Lethal cam is awesome to drive the drivability is great too...
I know the stock catback/stock TB and now maybe the Rotating Assemblies is a little heavier than LS7 but I really thought the car will be close to 560rwhp even with the stuff above
Edit dyno video
http://www.youtube.com/watch?v=G9WZaEloTM8
Sorry for the long thread....
PLEASE LET ME KNOW WHAT YOU GUYS THINK![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
Thanks in advance
Hussam.
![Winky](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_wink.gif)
I need some help here please.
Couple of months ago a friend of mine dynoed his C6 ZO6 with these mods:
AR 1.7/8 Headers with Off road X-pipe.
Stock catback.
Fast 102mm Intake (unported)
NW 102mm TB.
K&N CAI.
QM550 camshaft. (great cam with stock idle and awesome drivability)
PRC LS7 Heads ported from TSP milled to 68cc.
Spec stg 3+ clutch and aluminum flywheel.
Tune of course.
The car made 545rwhp 510rwtq with great mid range HP/TQ
![](http://i112.photobucket.com/albums/n181/venomws6/dynoQM550.jpg)
After couple of months the owner wanted another 20-30rwhp N/A and 200+shot so I talked to Trevor@TSP and since the owner didnt want the LSX Block for the weight I orederd TSP forged LS7 427ci since Trevor told it will handle the 250shot with the right tune and fuel.
I also ordered Nitrous Outlet plate system from TSP.
(BTW I recommend TSP for everyone I'm always happy when dealing with them and I'm overseas) thanks guys
![Hail](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_hail.gif)
He also changed the QM550 for RAGIN RACIN Lethal since we always seen great results from it.
Thanks for the fast shipping Shawn
![Mr. Cool](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_cool.gif)
Now for the dyno time same mods above but with stock TB and changed K&N CAI to the new Halltech Killerbee II....
The car only made 536rwhp 500rwtq N/A
![Sad](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_sad.gif)
Then added 103VP racing fuel for the nitrous
150shot 673rwhp 657rwtq
200shot 744rwhp 773rwtq I love the TQ
![Icon Eek](https://ls1tech.com/forums/images/smilies2/icon_eek.gif)
A/F Ratio is perfect at 12.8 for the N/A runs and 11.5 - 11.8 for the nitrous.
N/A
![](http://i112.photobucket.com/albums/n181/venomws6/dynoLethal.jpg)
150shot
![](http://i112.photobucket.com/albums/n181/venomws6/dyno150shot.jpg)
200shot
![](http://i112.photobucket.com/albums/n181/venomws6/dyno200shot.jpg)
Keep in mind guys all the N/A runs were on 90-91octane pump gas and 90 - 95 F whether The nitrous numbers were great but N/A were not that good we thought with the bigger cam and better CAI the car will gain 20-30rwhp
![Cry](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_cry.gif)
I already ordered B&B Fusion catback and will also order LMR 102mm TB
Hoping to see 560+rwhp .
BTW Lethal cam is awesome to drive the drivability is great too...
I know the stock catback/stock TB and now maybe the Rotating Assemblies is a little heavier than LS7 but I really thought the car will be close to 560rwhp even with the stuff above
Edit dyno video
http://www.youtube.com/watch?v=G9WZaEloTM8
Sorry for the long thread....
PLEASE LET ME KNOW WHAT YOU GUYS THINK
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
Thanks in advance
Hussam.
Last edited by venom ws7; 06-10-2010 at 11:32 PM.
#9
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Was this engine bolted in and taken right to the dyno? in TSP's defense, rings are going to take a little bit to seat, and could have a little blow by, especially harder nitrous rings if it was built for lots of nitrous use. Those tend to have a larger gap than an N/A application as well.
#12
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Nice combo but nice numbers ...
LOL
Its not a nitrous cam Shawn @ Ragin Racin have done a lot of 560+rwhp N/A with the same cam..
543rwhp dyno was with QM500 its a little bigger than stock LS7 Cam so the numbers were great..
But with Lethal cam I'm really surprised.
The block is not resleeved..
QM500 had very awesome drivability I can't really compare it with Lethal since the Lethal dyno numbers we have are not the best.....
But the drivability so far on Lethal is great for the cam size..
I think the QM550 will be a little better than Lethal under 3500rpm but anything higher than that Lethal pulls hard.
I've seen a lot of forged ZO6 making over 570rwhp I really dont think thats the problem..
No knocking at all actually the timing was really low on that run...
Was this engine bolted in and taken right to the dyno? in TSP's defense, rings are going to take a little bit to seat, and could have a little blow by, especially harder nitrous rings if it was built for lots of nitrous use. Those tend to have a larger gap than an N/A application as well.
No the car had over 1200miles I thought about that too..
How much do you think he will gain from porting the Intake?? 10rwhp ??
The numbers will still be low.
Yes
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i'm no expert or anything and don't know the cam specs on either cam but it looks like the new rr cam is dropping off power alittle earlier than the qm cam. if it is bigger unless it's on quite a bit tighter lsa or advanced some shouldn't it carry alittle longer ?