I'd like some oppinions as to how much HP/TQ I got at this point. Please read my sig. I know these are basic bolt-ons.
I'm sure there are folks, out there, that these mods to their cars.So, what am I looking at, aprox.?
Also, I got the Harwood glass hood and I took out the back seats+spare.
So my questions are:
What is my HP/TQ?
What is my weight?
What would be my 1/4 mile time(aprox)?
Thanks in advance.
Mike

------------------

1990 Formula
Factory:TPI-305/Dual Cat(230hp),5 Speed,3.42 rear, Dealer:Aluminum Drive Shaft
Mods:SLP air foil,K&N Filter, Accel:wires,coil cap,rotor.Hypertech Thermomaster chip,Stat,Fan switch,TES headers,MSD6AL,AFPR(46)
Flowmaster 3" Cat-back exhaust,TB coolant bypass, Centerforce clutch (going).

 

U should go to a dyno and get the results, because thats really the only accurate way, or a G-Tech for RWHP.

------------------
Looking For:

87 IROC-Z 350 TPI
84 TRANS AM 305 H.O.



[This message has been edited by IROCZTWENTYGR8 (edited March 23, 2001).]

 

Moving to General Engine

 

approx:
3300 lbs without driver
260hp
360lbft

 

ODB, by 260hp, you mean at the rear wheels, right? As far as weight, what would my GFXless Formula weigh with a Harwood glass hood(just installed) and a GM Notchback(hopefully soon to be).
The torque numbers I like, though.

------------------

1990 Formula
Factory:TPI-305/Dual Cat(230hp),5 Speed,3.42 rear, Dealer:Aluminum Drive Shaft
Mods:SLP air foil,K&N Filter, Accel:wires,coil cap,rotor.Hypertech Thermomaster chip,Stat,Fan switch,TES headers,MSD6AL,AFPR(46)
Flowmaster 3" Cat-back exhaust,TB coolant bypass, Centerforce clutch (going).

 

i'd say about 205 to 210 hp at the rear wheels and 14.4 roughly in the quarter.

 

do you think it was worth removing your back seats? how much do they weigh? was it a big hassle, ans what did you put where they used to be?? doug

------------------
'91 Z28 50,000 miles:
K&N; Fastchip; Airfoil; Custom 'Ram-Air'; SLP Headers; Slp Runners; Borla Catback 50% open; Poweraid TB spacer; March underdrive pulleys; Accel Extreme 9000 wires, coil; Hypertech rotor, cap; NGK platinum plugs; manual fan switch; TB coolant bypass; Pirelli P7000 Z245/50/R16 all season tires; Energy suspention motor mounts.

 

I'd give ya 250-260ish at the crank...

Low 14s probably, maybe high 13s at best in the 1/4 I'd guess.

------------------
Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray

[This message has been edited by Ray87Z (edited March 22, 2001).]

 

200rwhp=low 14's???
my modded 305 was putting out 191rwhp on gtech and the best time i could get was 15.1
and that was with very little spin, great traction. 3500lbs. 3.73 rear
why was i so slow??

 

I just don't see that combo running low 14's. I have a 350 with about 260hp, 3.73's and a t5 and am running high 14's/ low 15's at 3200ft elevation. I would say mid 15's at best, maybe faster at sea level.

 

The stock G92 5spd 305 TPIs will hit high 14s, full exhaust and the other mods should get some low 14s. I'm talking about sea level or near it... And I'm estimating rwhp on a dyno, not some Gtech numbers which are probably not accurate.

------------------
Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray

[This message has been edited by Ray87Z (edited March 23, 2001).]

 

gtech is accurate it isn't accurate,
seems to always change just to suit that persons opinion
chassis dyno's aren't all accurate either
there are huge descrepancies between one dyno and another, at least thats what everyone says.
if anything the gtech records a lower hp output since aerodynamic drag and road friction is a factor.

I guess hp is worth more at lower elevation or something

 

LOW 14's?

Maybe high 14's (in my opinion).

My car is a 14.5 sec car and its a L98 with the 'free mods'.


------------------
Tim Currie

1988 IROC-Z[*]5.7 L[*]T-Tops[*]Posi
Ported plenum, Ram air, Airfoil, MSD Superconductors cap/rotor coil.
AIM- TCurrie1
ICQ- 67616089
ctimmy@thegrid.net
The Score
6/0

"Steer with the rear wheels" - My '68 BB driving boss
Self-proclamied Creator of the All-Powerful Nor-Cal crew.

 

The altitude comment was toward the guy who runs at 3200 ft. Lower elevation does = much better times...

And I'm sorry but if you bone dead stock 5spd G92 305 TPI doesn't hit high 14s at least you need to sell it to someone that can drive... (again, I'm referring to sea level or near sea level tracks.) I think full exhaust and the other small mods this guy has are worth a decent bit. I would expect this car to beat early L98s w/ free mods...

------------------
Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray


[This message has been edited by Ray87Z (edited March 23, 2001).]

 

I would think HP is a constant though, I mean I run in high altitude as well, wouldnt that effect my HP readings? showing a lower # than at sea-level(assuming gtech is fairly accurate)

Good to see those later 305 have some grunt to them though, if indeed what your claiming is true

 

250hp and a mid-low 14.

 

Yeah, I'd say at sea level you could be running extreme low 14s, maybe even high 13s on a cold night.

------------------
1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End

Current Mods: LT4 HOT Cam, Comp Cams 1.52:1 Roller Rocker Arms, Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET (w/o LT4 cam): 14.32 @ 97.7mph
(corrected for elevation)

Soon to Come: 7.625" 10 Bolt with 3.42s and Accel TPI Intake Base

 

I would guestimate the car at mid-low 14s, myself.I mean stock 5speed, dual cat, 305s did high 14s out of the box.
As far as HP, I would think it would be more than 250-260. I mean it came 230hp and the mods I have have to be worth more than 30hp,combined.I should get that much from the exhaust upgrades. The reason I say this is because I really got a SOTP difference after I installed the Hypertech stage 2 chip. I mean REALLY BIG DIFFERENCE! Maybee its a fluke or my car just responded well to it, I don't know.I just know that my clutch stopped holding in 1st after that.
The next time I felt a real performance increase was after the headers,MSD and AFPR, which went in at the same time. Now the 1st gear is useless at WOT so when I race of a light, I switch into 2nd early(about 2500-3000) and still have plenty of ***** in second.When I first got the car and all that it had was a Flowmasaster 3"catback,I raced with what appeared to be a modded and well kempt 5.0 GT. We were on an empty parkway and we raced from light to light.And to my surprize we were neck to neck for most of the time.I remember seeing the guy's body move when he shifted gears.We were window to window through the whole thing.He was surprized, I guess, since he should have walked all over my bird.
Disclaimer to moderators: In no way am I trying to brag and I know that this is not the Racing and Autocross board.It's just an experience I had to share for comparison purposes.
Anyhow my true HP can only be measured on a dyno and my real ET will be known as soon as I get to English Town, this spring.
BTW I live a couple of hundred feet froom the beach so, I guess, that puts me at sea level.
To respond to the fellow who asked about the rear seats-removal; I removed the rear seat backs(20 lbs). I left the *** cushions.
Mike

------------------

1990 Formula
Factory:TPI-305/Dual Cat(230hp),5 Speed,3.42 rear, Dealer:Aluminum Drive Shaft
Mods:SLP air foil,K&N Filter, Accel:wires,coil cap,rotor.Hypertech Thermomaster chip,Stat,Fan switch,TES headers,MSD6AL,AFPR(46), Harwood fiberglass hood,
Flowmaster 3" Cat-back exhaust,TB coolant bypass, Centerforce clutch (going).

 

OK. I put my car on a dyno and it read 287HP and 352 pounds of TQ out of the AS$ END!!! Who was the genius that said I'm getting only 250-260HP at the crank?The damn car came w/230HP stock. If all the mods I did only net 30HP than a 5.0 Mustang is by far a better muscle-car.
I will post my 1/4 mile time after I get my new Dual Friction Centerforce clutch. I will run my car at English Town in the next few weeks.
`

------------------

1990 Formula
Factory:TPI-305/Dual Cat(230hp),5 Speed,3.42 rear, Dealer:Aluminum Drive Shaft
Mods:SLP air foil,K&N Filter, Accel:wires,coil cap,rotor.Hypertech Thermomaster chip,Stat,Fan switch,TES headers,MSD6AL,AFPR(46), Harwood fiberglass hood,original GM "Notchback GTA" hatch.
Flowmaster 3" Cat-back exhaust,TB coolant bypass, Centerforce clutch (going).

 

yeah that was gonna be my suggestion, englishtown. I'm hoping to get down there Wednesday night but I have no one to go w/ so it will kinda suck. I was there last summer, and ran a 15.1 with the mods in my sig ( I know, very poor...) but my trans was ****ed and the motor wasnt tuned very well, i'm hoping to hit at least a low 14 now. We are lucky to be at sea level...

 

whoops forgot the sig

------------------
350, Comp 262, Edelbrock Performer intake, Edelbrock 600 cfm carb and Edelbrock cat back, Summit headers and vette servo
-JVC, Eclipse, Pioneer, MTX, Phoenix Gold, Planet Audio

 

Do you get your 15 sec. 1/4 mile because of lousy traction? I'm afraid that when I get my new clutch, I'm gonna spin all over the place(or break something).I'm only concerned with what I can do on street tires, though.
I'm gonna go to E-Town in a week or so. I'm going on a weekend so I can give you a buzz(email) when i go.
Later

 

not to sound like a downer, but personally them numbers are way too good to be true. i don't see any head replacement in your list or even a cam. if you have the dyno sheet, post it. but personally, i don't buy 287rwhp from a 305 with a stock cam, stock heads, and only mild mods.

 

Have to say I'll believe that when I see it, but I'm not calling you a liar or anything. That is better than some heads/cam 350 TPIs have put out... However like someone pointed out up a ways not all dynos are created equal, although that is still way out of line for what one should expect. Car should baseline around 190-195 rwhp or thereabouts, I don't see any power mods equating out to a 100 rwhp gain. But that's not to say some stuff wasn't done before you owned the car or it is even a 305 for that matter...

------------------
Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray

 

Dude, you have dual cats and headers. Those are your only mods that I don't have..If you gained like 70 RWHP from those, than..well..I don't know what to say..are you SURE??? That also seems like a HUGE torque increase..Good luck man...I can't wait to hear your track times..

------------------

• Red '88 IROC 5 Speed 305 TPI w/3.08
• Dual Friction Stage III Centerforce Clutch
• Accel 300+ Racing Ignition
• Accel 300+ Pro Sleeve Plug Wires
• AC Delco Rapid Fire Plugs
• Flowmaster Force II 3 Chamber Cat Back Exhaust
• Hypertech Chip
• Hypertech Airfoil
• Gutted Air Box
• Best Maryland (40 degrees) E/T 14.686, 60' 2.205, 1/8th mile 9.461, 1/4 mile MPH 93.91
• Best Florida (80 degrees) E/T 14.88, 60' 2.163, 1/8th mile 9.540, 1/4 mile MPH 92.74
• Best 60' 2.163(Florida)
• TPiS AFPR set to 42psi using Accel Fuel Pressure Gauge (Installed after Maryland run)
• Aluminum Driveshaft (Installed after Maryland run)

 

I was surprized myself. Those numbers are too high for a "bolt-on"-uped 305. I bought the car at a dealer's auction so I didn't talk to the previous owner.I'm gonna investigate if I have a 305 or a transplanted 350. I can't tell.
I would love to post the computer print-out but I got webtv and I can't scan or print anything.
Anyhow, the way I see it is either I got a "fluke" fast car or there was somehing done to it before me, or the dyno is way off.
I will post 1/4 mile results after e-town.I will also let it be known before I go there so some of the people(in the area) on this board can meet me there. Mike

------------------

1990 Formula
Factory:TPI-305/Dual Cat(230hp),5 Speed,3.42 rear, Dealer:Aluminum Drive Shaft
Mods:SLP air foil,K&N Filter, Accel:wires,coil cap,rotor.Hypertech Thermomaster chip,Stat,Fan switch,TES headers,MSD6AL,AFPR(46), Harwood fiberglass hood,original GM "Notchback GTA" hatch.
Flowmaster 3" Cat-back exhaust,TB coolant bypass, Centerforce clutch (going).

 

I was surprized myself. Those numbers are too high for a "bolt-on"-uped 305. I bought the car at a dealer's auction so I didn't talk to the previous owner.I'm gonna investigate if I have a 305 or a transplanted 350. I can't tell.
I would love to post the computer print-out but I got webtv and I can't scan or print anything.
Anyhow, the way I see it is either I got a "fluke" fast car or there was somehing done to it before me, or the dyno is way off.
I will post 1/4 mile results after e-town.I will also let it be known before I go there so some of the people(in the area) on this board can meet me there. Mike

------------------

1990 Formula
Factory:TPI-305/Dual Cat(230hp),5 Speed,3.42 rear, Dealer:Aluminum Drive Shaft
Mods:SLP air foil,K&N Filter, Accel:wires,coil cap,rotor.Hypertech Thermomaster chip,Stat,Fan switch,TES headers,MSD6AL,AFPR(46), Harwood fiberglass hood,original GM "Notchback GTA" hatch.
Flowmaster 3" Cat-back exhaust,TB coolant bypass, Centerforce clutch (going).

 

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