Dyno full exhaust
Thread Starter
Member
Joined: Jan 2002
Posts: 1,697
From: Bay Area, CA
Dyno full exhaust
I was just wondering, If anyone on here installed LT's AND cats with bullet mufflers? IF so, how much did you gain rwhp? Note: I only want figures for full systems with cats.
Also, I read that JasonD only made about 17~18rwhp with his LT install. I thought LTs made like 20~25rwhp?
Also, I read that JasonD only made about 17~18rwhp with his LT install. I thought LTs made like 20~25rwhp?
Registered User
Joined: Sep 1998
Posts: 8,319
From: US 1 Mile Marker 52 in the Florida Keys
"Also, I read that JasonD only made about 17~18rwhp with his LT install. I thought LTs made like 20~25rwhp?"
actually i think i remember him saying 16...could be wrong.
but once again, most people are using "butt-meters" not actual dyno results.
another thing to consider is that the manifolds on the 01/02 cars are better designed than the 98-00, so that could account for some of the difference.
what i find funny is how guys trash the shorties and mids saying they don't make the power...when in actuality they probably make a solid 10-12hp...and LTs only make 15-20....
i mean that isn't that much of a difference
actually i think i remember him saying 16...could be wrong.
but once again, most people are using "butt-meters" not actual dyno results.
another thing to consider is that the manifolds on the 01/02 cars are better designed than the 98-00, so that could account for some of the difference.
what i find funny is how guys trash the shorties and mids saying they don't make the power...when in actuality they probably make a solid 10-12hp...and LTs only make 15-20....
i mean that isn't that much of a difference
Registered User
Joined: Apr 2001
Posts: 674
From: Sac, CA
Originally posted by teke184
[B.
what i find funny is how guys trash the shorties and mids saying they don't make the power...when in actuality they probably make a solid 10-12hp...and LTs only make 15-20.... i mean that isn't that much of a difference [/B]
[B.
what i find funny is how guys trash the shorties and mids saying they don't make the power...when in actuality they probably make a solid 10-12hp...and LTs only make 15-20....
i mean that isn't that much of a difference [/B]
The shorties by themselves were good for about 5 rwhp and the removal of the cats about another 5 ...
Registered User
Joined: Sep 1998
Posts: 8,319
From: US 1 Mile Marker 52 in the Florida Keys
"removal of the cats about another 5 "
that's the important part. as far as i'm concerned comparing shorties alone (retaining cats) with longtubes (and orp) is pointless.
but you pretty much proved my point (may not have clearified it in my other post):
shorties with the associated orp, compared to LTs with the associated orp...are not THAT far off.
and i wouldn't include tuning in the equation of comparing gains from headers. that's kindda like comparing 2 similar cams, but one is tuned and the other isn't....of course the numbers are gonna be skewed towards the tuned one
that's the important part. as far as i'm concerned comparing shorties alone (retaining cats) with longtubes (and orp) is pointless.
but you pretty much proved my point (may not have clearified it in my other post):
shorties with the associated orp, compared to LTs with the associated orp...are not THAT far off.
and i wouldn't include tuning in the equation of comparing gains from headers. that's kindda like comparing 2 similar cams, but one is tuned and the other isn't....of course the numbers are gonna be skewed towards the tuned one
Moderator
Joined: Jul 1998
Posts: 6,247
From: Charlotte,MI USA
Originally posted by teke184
[Banother thing to consider is that the manifolds on the 01/02 cars are better designed than the 98-00, so that could account for some of the difference.
[/B]
[Banother thing to consider is that the manifolds on the 01/02 cars are better designed than the 98-00, so that could account for some of the difference.
[/B]
Registered User
Joined: Apr 2001
Posts: 674
From: Sac, CA
Originally posted by teke184
[B
shorties with the associated orp, compared to LTs with the associated orp...are not THAT far off.
and i wouldn't include tuning in the equation of comparing gains from headers. that's kindda like comparing 2 similar cams, but one is tuned and the other isn't....of course the numbers are gonna be skewed towards the tuned one [/B]
[B
shorties with the associated orp, compared to LTs with the associated orp...are not THAT far off.
and i wouldn't include tuning in the equation of comparing gains from headers. that's kindda like comparing 2 similar cams, but one is tuned and the other isn't....of course the numbers are gonna be skewed towards the tuned one [/B]
And you have to include the tuning ... that extra 5 rwhp was unattainable with the shorties ... I couldn't improve on the stock tune with the shorties ... 12.8 AF/R ... I tried. I could lean it out, but the range of the MAFT was putting me out to 13.3 and I only gained 1 rwhp ... not enough to make worth while to run that lean ...
But with the LTS the AF/R went to 11.9 while gaining 10 rwhp. Tweaked the AF/R backed to 12.9 with a MAFT and picked up another 5 rhwp ...
Thread
Thread Starter
Forum
Replies
Last Post
F'n1996Z28SS
Cars For Sale
8
Aug 23, 2023 11:19 PM
armedtrigger
LT1 Based Engine Tech
10
Feb 24, 2015 08:30 PM
