Nasty_Bird_'90

check out my mods below. i ran it on Gtech last week and it gave me a 15.20 @ 99. Seems to me the car shouldn't be that quick. I know youre supposed to add 2 tenths to that, but thats still a 15.40? wtf?

Abel Kane

I'm not Camaro expert though. That's a 305, right? Sounds right to me. 200 something horse? 250-290 lbs/ft? Yes. sounds right.
I'll probably get a Gtech sometime in the future, but if I were you, I would perform several other tests as well.
1) If you have a place that you know is a 1/4 mile, run it and time yourself.
2)Use the little calculater test.
3)Run it a few more times on the Gtech.

Granted these are all either hokey or no iron clad, but if I got the same results...I think that it would be more convincing for you. It would be for me. Hell, I'm convinced anyway.

#1 way to know for sure is to get it to a track. Which can be difficult enough...

Mark A Shields

I ran a 15.32 @95mph.. Be sure the road is flat and it's in the center of the windshield.

But that will change by Friday or so.

Boxeat2469

G-Tech is pretty damn accurate. I was just at the track last night. I did five passes, all with the G-Tech running. Two of the passes were dead on with my time slips. The worst one was only off by .18 . The mph was consistently 3 - 4 mph faster according to the G-Tech, but it tells you right in the instruction manual this will happen.

Abel Kane

Well, then I'm definitely getting one. I was just spouting off hearsay.
I'm not getting one until my cars have got a few things done though. Otherwise it won't tell me what I want and could hurt my feelings.

Cuco85T/A

When I started reading it I thought you were going to be dissappointed. Stock a 305 should run mid 15s and with your mods you should be low 15s like your g-tech indicated. If you still
have doubts do what Abel Kane said just to be certain and/or
take it to the track.

unknown_host

iTrader: (1)

TPI cars are mid 15 second cars not TBI cars people

unknown_host

iTrader: (1)

And my friend with a decent tuned all stock 305TPI 90 IROC went 15.5 this year.

Mark A Shields

Yep.

unknown_host

iTrader: (1)

what are you doing friday that is going to change things? i hope you are getting some nice heads (vortecs work nicely), their 64 cc combustion chambers will bump the compression up on the goodwrench considerably (9.x as opposed to 8.5). although if you already have a weiand intake maybe consider some other budget performance heads. so what is planned or are you just running the car again?

Nasty_Bird_'90

Mid 15's stock? I wish! When i had my camaro, Lo3, Flowmaster, i went to the track and my best was a 16.1. I had good reaction time, the air was good too. I don't know. My buddy has a stock 92 RS and cant break into the Mid 16's. His best has been a 16.80. But he cant drive either.

unknown_host

iTrader: (1)

L03's are mid 16 second cars stock and GTECH is bull****ting you if you took an entire second off with an ignition tune up and a catback exhaust.

jordanz28ss

15.6 with my TBI..and mods

Mark A Shields

I just updated my sig a little prematurely. Right now the new cam is in, but I'm waitin on the gear drive and roller rockers to come in.
I won't be doing headwork till next summer. Either port these which are meaty or get new ones, money depending.

Cuco85T/A

Sorry, didn't know he was a TBI thought he was a TPI. I know TBI isn't a mid 15 second car.(one little mistake and....... )
oh well

unknown_host

iTrader: (1)

the gm goodwrench "light" heads are not a good idea to mess with. i thought so too but i guess they are light duty heads and dont hold up to a lot of toying with. my friend has a 73 nova with the gm goodwrench and he was looking into having our friend port, polish and shave em but i guess everyone said it is not worth it oh well. that should run a lot faster than 15's. that was the cam i was gonna get before i decided i didnt want gas mileage. now i am looking into AFR 190's and a magnum 286 cam. i want to stay below 6000 rpm with the stock crate internals. what do you wanna run after the cam and roller rockers, and what ratio did you get?

jerflash

iTrader: (1)

look this is the best time i ran
14.86 @ 89.5MPH

i know that mph is way slow but the reason i think is i did nto want to spin my tires because my posi is gone so i left the line like a bitch also i think im having truble with my fuel pressure

rezinn

G-techs are only as accurate as the data you give them. If you don't have it balanced perfectly and don't have a perfectly flat, straight road, your results will not be accurate. That said, I ran 15.2 @ 94 on the gtech one time I tried it and ran 14.6 @ 95 the next day at the track. I know I screwed up.