wanna know what a 997 cup car makes on the dyno?
12-09-2005, 11:56 AM
#16
Interesting. So Larry's street car has 390 rwhp and Glen's one of many cup cars has 361.
Makes me wonder how different these 2 engines really are (sorry to resume an old subject) and why the cup engine needs frequent rebuilds while the street car engine doesn't.
A
Makes me wonder how different these 2 engines really are (sorry to resume an old subject) and why the cup engine needs frequent rebuilds while the street car engine doesn't.
A
12-09-2005, 12:07 PM
#17
Former Vendor
Join Date: Aug 2005
Location: Charleston, SC
Posts: 234
Likes: 0
Received 0 Likes
on
0 Posts
There is a good bit of variance dyno-to-dyno. We use SAE correction to help normalize different conditions on the same dyno.
A GT3 street car put down 355 hp, and a 2005 cup (stock) did 360 hp. The GT3 street and Cup engines are very similar. There is alot to be gained with mapping on the Cup car, though.
The 2007 997 GT3 Cup made more power and torque than a stock '05 cup (especially from 7500-8200rpm), but not nearly what the #14 car with GA map and headers made.
A GT3 street car put down 355 hp, and a 2005 cup (stock) did 360 hp. The GT3 street and Cup engines are very similar. There is alot to be gained with mapping on the Cup car, though.
The 2007 997 GT3 Cup made more power and torque than a stock '05 cup (especially from 7500-8200rpm), but not nearly what the #14 car with GA map and headers made.
12-09-2005, 02:32 PM
#18
Originally Posted by Larry Herman
Geez Leh, I hope that it makes 390 rwhp. That would put it around 440 at the flywheel. I know that it was an optimistic reading, but my car was dyno'd at 387 rwhp, and Rockitman's GT3 right before it was 371. If you figured that the dyno was 7 or 8% high, his would be right at factory specs, and mine would be stronger, but that means that your 997 cup car only has about 30 more hp, and that seems low.
the dyno you were on musta been a little off....
we have dynoed GT3 streets in the 350whp area
12-09-2005, 03:11 PM
#21
Rennlist
Basic Site Sponsor
Basic Site Sponsor
Leh, I agree about the dyno. Chris's (Rockitman) car is a street GT3 with the europipe exhaust system. Mine was dyno'd with straight pipes & made 15 hp more than Chris's car. If his was making stock or a little more, then mine is quite strong. 
Still, I would expect that a cup car has a bit more than that.
Still, I would expect that a cup car has a bit more than that.
__________________
Larry Herman
2016 Ford Transit Connect Titanium LWB
2018 Tesla Model 3 - Electricity can be fun!
Retired Club Racer & National PCA Instructor
Past Flames:
1994 RS America Club Racer
2004 GT3 Track Car
1984 911 Carrera Club Racer
1974 914/4 2.0 Track Car
CLICK HERE to see some of my ancient racing videos.
Larry Herman
2016 Ford Transit Connect Titanium LWB
2018 Tesla Model 3 - Electricity can be fun!
Retired Club Racer & National PCA Instructor
Past Flames:
1994 RS America Club Racer
2004 GT3 Track Car
1984 911 Carrera Club Racer
1974 914/4 2.0 Track Car
CLICK HERE to see some of my ancient racing videos.
12-09-2005, 03:13 PM
#23
Rennlist
Basic Site Sponsor
Basic Site Sponsor
They don't have quite the top end that your car has, Norm, but they are quite a kick in the corners. Maybe now the bottom will fall out of the 996 Cup Car market & I can get one. 
12-09-2005, 03:15 PM
#24
Addict
Rennlist Member
Rennlist Member
Larry,
I'd definitely give up some top end for a car that handles like that plus I _really_ want a sequential shift. My shifter kart has it and I love it. Plus I love the 997 cup looks...
Wonder what it would be like to drive with my engine in that beauty...
Norm
I'd definitely give up some top end for a car that handles like that plus I _really_ want a sequential shift. My shifter kart has it and I love it. Plus I love the 997 cup looks...
Wonder what it would be like to drive with my engine in that beauty...
Norm
12-09-2005, 03:40 PM
#25
Three Wheelin'
I'm sure most know this, but comparing one dyno figures to the other are like comparing apples to oranges... some are load bearing, etc. Even on the same dyno the numbers will be different from one day to another. Dyno numbers are for bench racers, tuning and breaking in.
12-09-2005, 03:53 PM
#26
Rennlist
Basic Site Sponsor
Basic Site Sponsor
Originally Posted by MJR911
I'm sure most know this, but comparing one dyno figures to the other are like comparing apples to oranges... some are load bearing, etc. Even on the same dyno the numbers will be different from one day to another. Dyno numbers are for bench racers, tuning and breaking in.
12-09-2005, 04:30 PM
#28
Originally Posted by AW
Interesting. So Larry's street car has 390 rwhp and Glen's one of many cup cars has 361.
Makes me wonder how different these 2 engines really are (sorry to resume an old subject) and why the cup engine needs frequent rebuilds while the street car engine doesn't.
A
Makes me wonder how different these 2 engines really are (sorry to resume an old subject) and why the cup engine needs frequent rebuilds while the street car engine doesn't.
A
Merry Christmas!
G
12-09-2005, 04:48 PM
#29
Rennlist Member
On the dynos that bolt onto the rear hubs, our late model cup cars are consistently in the mid to high 380s. Have not run mine on the same dyno as seen above. PMNA told me that these cars make about 410 HP on a freshly rebuilt engine on their engine dyno (mine was run last week). My engine's torque curve heads south after 7K but HP peaks at 7400. I guess the 997 will show more peak power but about the same curve below 7K? Mine has a pretty big dip at about 6100, did they tune that out yet?
12-09-2005, 05:29 PM
#30
Rennlist Member
Kingleh, why dont you tell us about the speed world challenge engine in the cup car power! and then let us drool over the dyno run of the 996GT3R without the restrictors!!!
amazing!!!!
Hey Brian,
what are the stock 996 for Grand AM cup GS running now as far as hp?
MK
amazing!!!!
Hey Brian,
what are the stock 996 for Grand AM cup GS running now as far as hp?
MK
Originally Posted by kingleh
and no wonder you go so fast Larry... you have nearly 400rwhp !!!!