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Dyno guess game for fun

ras

Member
Joined
May 25, 2012
Messages
14
Location
Balsam Lake Wisconsin
Corvette
1995 torch red coupe
Ok guys and gals i am not looking for a debate on what are the best mods for an LT1. I just thought a few of you might want to take a guess at what my rear wheel dyno results will be on 5-17-13 at TPIS in Chaska MN. Here is a list of upgrades i have performed and my vets info.
1995 lt1 (300 hp stock) 6 speed coupe with 68000 miles.
.039 head gaskets
52 mm bored stock throttle body with air foil.
stock injectors
cut open air cleaner lid and added new k&n filter
stock intake ported
stock heads with home port & polish, valve job and milled .006 to clean up.
obx long tube sst headers with 1.7" primary tubes and 2.5" collectors
replaced all cats with 2.5" sst pipe, installed x pipe and still running stock mufflers (sounds great and no drone):happyanim:
new optispark (delphi), plugs (ac delco 41-906) and wires (taylor 8.5mm)
bypassed throttle body coolant
comp cams 1.52 ratio magnum rockers and pushrods
new antenna mast (will turn radio off for dyno run):chuckle
and of course a custom tune by TPIS on dyno day.
This was just a basic head gasket job with a little "well since i have it apart". Currently running good but i am sure the tune will help alot.
Take a guess at max hp and torque and i will post the results.
 

Idaho Slim

Well-known member
Joined
Jul 2, 2003
Messages
184
Location
Archer, Idaho
Corvette
1996 LT1- Blk/Blk. 1996 LT4 - White/Blk
I will go out on a limb, At rear wheels; 308 h.p. corrected pre-tune, 332 post tune :upthumbs Similar to what my LT4 showed (316 pre - 344 post) after some minor mods and tune. You have better flow heads & headers so it should be close to what I got. VERY interested to see the results!!
 
Last edited:

vigman

Motor head!!!!
Joined
Feb 13, 2001
Messages
3,471
Location
Valencia, CA,USA
Corvette
88 Convert ( SOLD ) /1973 coupe 4 speed/1964 Vert!
280hp-300ft lbs

What does the closest guess win ?
 

Mac

Well-known member
Administrator
Joined
Feb 13, 2003
Messages
5,475
Location
Ottawa, Canuckistan
Corvette
1973 coupe L82 (gone as casualty of divorce)
Playing for pride, not prize!

312 hp & 321 ft/lb

-Mac
 

Phinstr

Member
Joined
May 5, 2013
Messages
24
Location
Wenatchee, WA, USA
Corvette
1999 FRC Torch Red
Your 300HP is probably BHP. Since we're going Dyno, that probably equates to about 255RWH....so, from the dyno, I guess at 290RWHP.
 

ras

Member
Joined
May 25, 2012
Messages
14
Location
Balsam Lake Wisconsin
Corvette
1995 torch red coupe
Brain freeze

Well i brought my vet to dyno shop today and after 5 pulls we were getting some nice positive results and on the final reprogram my vets brain decided to crash and die :CRASH. The local dealership cant get a new one until Wednesday so it looks like the game has been extended to 5-22-13.
 

Hib Halverson

Technical Writer for Internet & Print Media
Joined
Jan 10, 2001
Messages
13,453
Location
CenCoast CA
Corvette
71 04 12 19
Well i brought my vet to dyno shop today and after 5 pulls we were getting some nice positive results and on the final reprogram my vets brain decided to crash and die :CRASH. The local dealership cant get a new one until Wednesday so it looks like the game has been extended to 5-22-13.

Bummer...actually, worse yet, an expensive bummer.
:(

Typically, when the ECM gets "fried" during a reprogram, it's the calibration "engineer" or his/her hardware who screwed up or the car has a problem with wires, connections or system voltage.

Before your next "tuning" session, it might be a good idea to get a handle on why the controller got fried so you or your cal guy don't repeat the mistake.
 

vigman

Motor head!!!!
Joined
Feb 13, 2001
Messages
3,471
Location
Valencia, CA,USA
Corvette
88 Convert ( SOLD ) /1973 coupe 4 speed/1964 Vert!
What were the last numbers

before the "cook"...
 

ras

Member
Joined
May 25, 2012
Messages
14
Location
Balsam Lake Wisconsin
Corvette
1995 torch red coupe
Results

Ok guys and gals i am not looking for a debate on what are the best mods for an LT1. I just thought a few of you might want to take a guess at what my rear wheel dyno results will be on 5-17-13 at TPIS in Chaska MN. Here is a list of upgrades i have performed and my vets info.
1995 lt1 (300 hp stock) 6 speed coupe with 68000 miles.
.039 head gaskets
52 mm bored stock throttle body with air foil.
stock injectors
cut open air cleaner lid and added new k&n filter
stock intake ported
stock heads with home port & polish, valve job and milled .006 to clean up.
obx long tube sst headers with 1.7" primary tubes and 2.5" collectors
replaced all cats with 2.5" sst pipe, installed x pipe and still running stock mufflers (sounds great and no drone):happyanim:
new optispark (delphi), plugs (ac delco 41-906) and wires (taylor 8.5mm)
bypassed throttle body coolant
comp cams 1.52 ratio magnum rockers and pushrods
new antenna mast (will turn radio off for dyno run):chuckle
and of course a custom tune by TPIS on dyno day.
This was just a basic head gasket job with a little "well since i have it apart". Currently running good but i am sure the tune will help alot.
Take a guess at max hp and torque and i will post the results.

Well i picked up my vet today from the tuners with its new ECM and am pleased with the service i got from TPIS.They made this ECM meltdown as painless as possible by completely handling the problem and picking up the bill for the new ECM. I am also pleased with the numbers they got me.

pretune rear wheel max hp 272.8@5800rpm max torque 290.4@4000rpm
post tune rear wheel max hp 313.3@5800rpm max torque 311.5@3900rpm
 

vigman

Motor head!!!!
Joined
Feb 13, 2001
Messages
3,471
Location
Valencia, CA,USA
Corvette
88 Convert ( SOLD ) /1973 coupe 4 speed/1964 Vert!
I think Mac was closest~

Ftw.....
 

Hib Halverson

Technical Writer for Internet & Print Media
Joined
Jan 10, 2001
Messages
13,453
Location
CenCoast CA
Corvette
71 04 12 19
Well i picked up my vet today from the tuners with its new ECM and am pleased with the service i got from TPIS.They made this ECM meltdown as painless as possible by completely handling the problem and picking up the bill for the new ECM. I am also pleased with the numbers they got me.

pretune rear wheel max hp 272.8@5800rpm max torque 290.4@4000rpm
post tune rear wheel max hp 313.3@5800rpm max torque 311.5@3900rpm

Wow. TPIS...good guys, for sure!

Are those dyno numbers std.- or SAE-corrected?

313 at the wheels for a C4 manual is about 380 at the flywheel. If the rwhp number is std. corrected, that's really good. If the rwhp is SAE-corrected, that's freakin' incredible.
 

ras

Member
Joined
May 25, 2012
Messages
14
Location
Balsam Lake Wisconsin
Corvette
1995 torch red coupe
Wow. TPIS...good guys, for sure!

Are those dyno numbers std.- or SAE-corrected?

313 at the wheels for a C4 manual is about 380 at the flywheel. If the rwhp number is std. corrected, that's really good. If the rwhp is SAE-corrected, that's freakin' incredible.

313 hp at the wheels is STD corrected. And yea TPIS knows how to treat thier customers and i will be going back there for future projects. The day the ECM fried they bought me lunch, drove me home (1.75 hr. drive one way),gave me a hat and offered to deliver the car when it was done. I was able to pick it up myself without missing work so i did and they gave me gas money and bought a couple of my stock parts for a fair price. I was also happy with thier $300 price for the 5 dyno pulls and a tune that got me a 40.5 HP gain.:thumb
 

Mac

Well-known member
Administrator
Joined
Feb 13, 2003
Messages
5,475
Location
Ottawa, Canuckistan
Corvette
1973 coupe L82 (gone as casualty of divorce)

89blackvette

Well-known member
Joined
Feb 7, 2003
Messages
178
Location
Sylvester, Georgia
Corvette
1992 white Coupe
Dyno

pretune rear wheel max hp 272.8@5800rpm max torque 290.4@4000rpm
post tune rear wheel max hp 313.3@5800rpm max torque 311.5@3900rpm

Looks like very good results from tune. Dump the air foil in the throttle body it is gord nothing but take some money out of your pocket, trade it for a six pack of your favorite beverage and rock on.
 

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