MTI Stage 2 + X1 cam dyno results - Corvette
07-24-2002, 09:52 AM
#1
MTI Stage 2 + X1 cam dyno results - Corvette This time on a Corvette, thru the full exhaust system:
1999 Corvette Hardtop (6-speed)
-MTI Stage II LS6 Heads: 2.055"I/1.60"E(tulip) valves, 6205 Isky double coil valve springs w/ damper and custom titanium retainers
-MTI's all new X1 camshaft: 230I/227E @ 0.050" 112 LSA 0.591"I/0.571"E Lift
-FLP header/exhaust system
-Katech timing chain
-Crane lifters
-MTI hardened pushrods
-SVO 30 Lb. injectors
-Corsa Indys with Pro Tips
-Custom tuning
<img src="http://www.cemozone.com/lolita/images/c5dyrun16.jpg" alt=" - " />
This graph shows the differences between stock, bolt-ons only and the current numbers for Cemo's 1999 Hardtop.
Nice numbers Cemo!
-Tony
1999 Corvette Hardtop (6-speed)
-MTI Stage II LS6 Heads: 2.055"I/1.60"E(tulip) valves, 6205 Isky double coil valve springs w/ damper and custom titanium retainers
-MTI's all new X1 camshaft: 230I/227E @ 0.050" 112 LSA 0.591"I/0.571"E Lift
-FLP header/exhaust system
-Katech timing chain
-Crane lifters
-MTI hardened pushrods
-SVO 30 Lb. injectors
-Corsa Indys with Pro Tips
-Custom tuning
<img src="http://www.cemozone.com/lolita/images/c5dyrun16.jpg" alt=" - " />
This graph shows the differences between stock, bolt-ons only and the current numbers for Cemo's 1999 Hardtop.
Nice numbers Cemo!
-Tony
07-24-2002, 09:56 AM
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Re: MTI Stage 2 + X1 cam dyno results - Corvette Impressive numbers, but whats the reasoning behind the SVO 30lb injectors?? I didn't think a H/C swap promted that. <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
07-24-2002, 09:57 AM
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Re: MTI Stage 2 + X1 cam dyno results - Corvette Not to down the numbers, but isn’t that a little low? I just saw a M6 Stage II LS1 head & T1 cam car with SLP LTs (ORP), LM catback, lid, TB, LS6 intake, and tuning make 422 & 404 in the summer heat on a Dynojet. For LS6 heads and that much cam, should it not be higher? Maybe because it was running through mufflers? Just curious?
07-24-2002, 10:40 AM
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Re: MTI Stage 2 + X1 cam dyno results - Corvette </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by RPM WS6:
<strong>Not to down the numbers, but isn’t that a little low? I just saw a M6 Stage II LS1 head & T1 cam car with SLP LTs (ORP), LM catback, lid, TB, LS6 intake, and tuning make 422 & 404 in the summer heat on a Dynojet. For LS6 heads and that much cam, should it not be higher? Maybe because it was running through mufflers? Just curious?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Man - we must be totaly spoiled these days! <img border="0" alt="[judgement]" title="" src="graemlins/gr_judge.gif" />
I never thought I would see the day where someone can actually say that 420+ RWHP was not "par"... <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />
<strong>Not to down the numbers, but isn’t that a little low? I just saw a M6 Stage II LS1 head & T1 cam car with SLP LTs (ORP), LM catback, lid, TB, LS6 intake, and tuning make 422 & 404 in the summer heat on a Dynojet. For LS6 heads and that much cam, should it not be higher? Maybe because it was running through mufflers? Just curious?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Man - we must be totaly spoiled these days! <img border="0" alt="[judgement]" title="" src="graemlins/gr_judge.gif" />
I never thought I would see the day where someone can actually say that 420+ RWHP was not "par"... <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />
07-24-2002, 11:05 AM
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Re: MTI Stage 2 + X1 cam dyno results - Corvette </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by bparker:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by RPM WS6:
<strong>Not to down the numbers, but isn’t that a little low? I just saw a M6 Stage II LS1 head & T1 cam car with SLP LTs (ORP), LM catback, lid, TB, LS6 intake, and tuning make 422 & 404 in the summer heat on a Dynojet. For LS6 heads and that much cam, should it not be higher? Maybe because it was running through mufflers? Just curious?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Man - we must be totaly spoiled these days! <img border="0" alt="[judgement]" title="" src="graemlins/gr_judge.gif" />
I never thought I would see the day where someone can actually say that 420+ RWHP was not "par"... <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">It’s just that I hear all these great things about LS6 heads, and looking at the specs of a X1 cam it is far more aggressive than a T1, yet I have seen the same numbers out of Stage 2 LS1 heads with a T1 and similar bolt-ons otherwise.
Believe me, I’m not downing 420+ rwhp <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> I’m just wondering if such a big cam and LS6 heads are really necessary to get there? Maybe the car was left rich during the tune in preparation for N2O use?
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by RPM WS6:
<strong>Not to down the numbers, but isn’t that a little low? I just saw a M6 Stage II LS1 head & T1 cam car with SLP LTs (ORP), LM catback, lid, TB, LS6 intake, and tuning make 422 & 404 in the summer heat on a Dynojet. For LS6 heads and that much cam, should it not be higher? Maybe because it was running through mufflers? Just curious?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Man - we must be totaly spoiled these days! <img border="0" alt="[judgement]" title="" src="graemlins/gr_judge.gif" />
I never thought I would see the day where someone can actually say that 420+ RWHP was not "par"... <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">It’s just that I hear all these great things about LS6 heads, and looking at the specs of a X1 cam it is far more aggressive than a T1, yet I have seen the same numbers out of Stage 2 LS1 heads with a T1 and similar bolt-ons otherwise.
Believe me, I’m not downing 420+ rwhp <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> I’m just wondering if such a big cam and LS6 heads are really necessary to get there? Maybe the car was left rich during the tune in preparation for N2O use?
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07-24-2002, 11:50 AM
#8
Re: MTI Stage 2 + X1 cam dyno results - Corvette Injectors are for his nitrous kit. They weren't required.
LS6 heads do very little for 346ci setups, MTI doesn't even recommend them for 346ci setups unless you have plans later to increase the cubes. Knowing Cemo personally, you can count on that to happen down the road.
Corvettes typically dyno less than F-bodies due to more drivetrain loss. They seem to always make less torque than an F-body, even with the exact same motor modifications. Look at that huge torque plateau! That is nice for a 346ci C5. Also take note how this setup makes all of its power before 6500 rpm. That is some excellent area under the curve!
Tony
LS6 heads do very little for 346ci setups, MTI doesn't even recommend them for 346ci setups unless you have plans later to increase the cubes. Knowing Cemo personally, you can count on that to happen down the road.
Corvettes typically dyno less than F-bodies due to more drivetrain loss. They seem to always make less torque than an F-body, even with the exact same motor modifications. Look at that huge torque plateau! That is nice for a 346ci C5. Also take note how this setup makes all of its power before 6500 rpm. That is some excellent area under the curve!
Tony
07-24-2002, 04:13 PM
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Re: MTI Stage 2 + X1 cam dyno results - Corvette Cemo, them #s ain't too shabby. I know he's going to enjoy that thing @ HRP and the wild streets of H-town!!! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> <img border="0" alt="[Z06 Corvette]" title="" src="graemlins/z06.gif" />
07-24-2002, 04:58 PM
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Re: MTI Stage 2 + X1 cam dyno results - Corvette The LG Motorsport "TRUE LONGTUBES" on this combo should pick up the TQ/HP @ 3000 and below and make that "HUMP" even wider.
Normally the cars are up 15-20rwtq at lower RPM with the LG's.
At the upper RPMs you are talking a bonus of an additional 5-10rwhp over the other "LONG TUBES" for C5's which are really "mid length" headers.
The dyno graph would be really interesting with the LG LT's.
It is very nice as it is, as it gets near that TQ peak and holds it for a long time.
I'm wondering if there would be a way for a good STREETABLE 460-470rwhp out of 346 cubics.
Probably with a SPLIT solid with a few more degrees and good deal more lift - might as well notch pistons.
Same head.
LG LT and non restrictive exhaust,
we are talking of a dyno
of around 470rwhp with 420rwtq for a long period of time.
Pop 388 cubic of all bore under this one, and you are talking about 520rwhp/470rwtq - on par with the BIG strokers.
Normally the cars are up 15-20rwtq at lower RPM with the LG's.
At the upper RPMs you are talking a bonus of an additional 5-10rwhp over the other "LONG TUBES" for C5's which are really "mid length" headers.
The dyno graph would be really interesting with the LG LT's.
It is very nice as it is, as it gets near that TQ peak and holds it for a long time.
I'm wondering if there would be a way for a good STREETABLE 460-470rwhp out of 346 cubics.
Probably with a SPLIT solid with a few more degrees and good deal more lift - might as well notch pistons.
Same head.
LG LT and non restrictive exhaust,
we are talking of a dyno
of around 470rwhp with 420rwtq for a long period of time.
Pop 388 cubic of all bore under this one, and you are talking about 520rwhp/470rwtq - on par with the BIG strokers.
07-24-2002, 06:35 PM
#12
Re: MTI Stage 2 + X1 cam dyno results - Corvette Nice numbers there Squeaky *****!
Has anyone tried the X1 with stock heads and bolt-ons? I might throw one in the C5 when I get it to hold me over until I have enough $$$ for the MagnaCharger <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" /> <img border="0" alt="[Corvette]" title="" src="graemlins/corvette.gif" />
Has anyone tried the X1 with stock heads and bolt-ons? I might throw one in the C5 when I get it to hold me over until I have enough $$$ for the MagnaCharger <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" /> <img border="0" alt="[Corvette]" title="" src="graemlins/corvette.gif" />
07-25-2002, 12:25 AM
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Re: MTI Stage 2 + X1 cam dyno results - Corvette </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by RPM WS6:
[QBBelieve me, I’m not downing 420+ rwhp <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> I’m just wondering if such a big cam and LS6 heads are really necessary to get there? Maybe the car was left rich during the tune in preparation for N2O use?[/QB]</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Well - you are stuck on the "peak" # - where as the difference is all throughout the power curve - where the HP & TQ kicks in - how much and when the power kicks in and how long it lasts.. Those factors are going to make up the differences between different cam profiles..
[QBBelieve me, I’m not downing 420+ rwhp <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> I’m just wondering if such a big cam and LS6 heads are really necessary to get there? Maybe the car was left rich during the tune in preparation for N2O use?[/QB]</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Well - you are stuck on the "peak" # - where as the difference is all throughout the power curve - where the HP & TQ kicks in - how much and when the power kicks in and how long it lasts.. Those factors are going to make up the differences between different cam profiles..
07-25-2002, 12:42 AM
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Re: MTI Stage 2 + X1 cam dyno results - Corvette Good points. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
07-25-2002, 10:37 AM
#15
Re: MTI Stage 2 + X1 cam dyno results - Corvette Nobody has tried it with stock heads that I know about, but I could be wrong. I haven't kept up with the cars at the shop lately, been partying too much.
<img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" />
Tony
<img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" />
Tony
07-25-2002, 02:01 PM
#16
Re: MTI Stage 2 + X1 cam dyno results - Corvette Yeah I hear ya tough guy!
If ya hear anything let me know.
Thanks <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" /> <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" /> <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" /> <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" />
If ya hear anything let me know.
Thanks <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" /> <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" /> <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" /> <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" />
07-26-2002, 12:48 AM
#19
Re: MTI Stage 2 + X1 cam dyno results - Corvette From what I have heard from MTI on this set up, his numbers look about on "par" for the combo. Considering the loss the vettes have in comparison to the Fbody cars. I have the same set up coming to me 1st or second week of next month (hopefully). MTI does recomend going to bigger inches with these heads though. I plan on doing a build up but it wont be for a while. I guess I will get to guenea pig "how long will they last on a stock bottom end".
07-26-2002, 11:58 PM
#20
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Re: MTI Stage 2 + X1 cam dyno results - Corvette You've gotta love the n/a #'s that H&C cars are getting these days ! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />