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Author Topic: HELP....my so called performance slug  (Read 24242 times)

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Offline reserved

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HELP....my so called performance slug
« Reply #20 on: June 26, 2006, 10:20:44 PM »
;48

Oops sorry Cam
I didn't see your post.

:mmm;43;mmm
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Offline 77CVT

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« Reply #21 on: June 27, 2006, 01:24:19 PM »
Quote
no didnt set fuel reg on dyno...but i took her to track a while ago before i changed gears ratio to 3.73s, throttle body 52m, cold air, an fuel reg an she ran a 14.60. now thats slow but i didnt think that bad for stock. i wil def run her as soon as i can an let u's all kno


You should go lower than that.  Practice with different launch rpm's.  I can't launch over 800rpm or it goes sideways into 2nd.  Mind you I have crap tyres.

Are you holding 3rd gear or into o/d?  with 3.73 gears I would have though you could go into o/d briefly.

Mr69er, I do 13's and is older than a 90.  Can I get away without a skirt?  Don't make me spend more $$ and come down there and kick your high 12's azz!!  ;--
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Offline Vette Obsessed

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HELP....my so called performance slug
« Reply #22 on: June 27, 2006, 02:11:27 PM »
Quote
Originally posted by 77CVT
Quote
no didnt set fuel reg on dyno...but i took her to track a while ago before i changed gears ratio to 3.73s, throttle body 52m, cold air, an fuel reg an she ran a 14.60. now thats slow but i didnt think that bad for stock. i wil def run her as soon as i can an let u's all kno


You should go lower than that.  Practice with different launch rpm's.  I can't launch over 800rpm or it goes sideways into 2nd.  Mind you I have crap tyres.

Are you holding 3rd gear or into o/d?  with 3.73 gears I would have though you could go into o/d briefly.

Mr69er, I do 13's and is older than a 90.  Can I get away without a skirt?  Don't make me spend more $$ and come down there and kick your high 12's azz!!  ;--


mrvett, there are alot of variables in getting a car down the quarter so don't consider that the be all and end all at this point (as a side note (and I am open to correction here) I hope you aren't using much more than around 4500rpm before shifting as when my top end was stock I found that didn't help).

Just check the basics like timing, compression, ignition and fuel pressure and then go from there.  With your gearing & mods and a good tune you have a fair bit more in the car as it is before you do any other mods in my opinion.

p.s. - 77CVT, I don't think any of the Ratpackians have set an ET starting with a 12 yet (not that I can talk). ;53
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Offline SC

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« Reply #23 on: June 27, 2006, 09:29:33 PM »
is it worth while trying to set up a day where we could check compressions and ignition timing
a lot of people forget the basic's  and there not hard to do
most people know how to do a comp test and timing but just dont have the equipment
the club is about helping each other well here's a chance
I can get hold of timing light, comp gauge and vacuum gauge and fuel pressure gauges
what does everone think
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Offline SC

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« Reply #24 on: June 27, 2006, 09:31:22 PM »
sorry cam for getting off the subject
its the rat packs fault
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Offline Cameron 77C3

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« Reply #25 on: June 27, 2006, 09:54:10 PM »
Quote
Originally posted by SC
is it worth while trying to set up a day where we could check compressions and ignition timing
a lot of people forget the basic's  and there not hard to do
most people know how to do a comp test and timing but just dont have the equipment
the club is about helping each other well here's a chance
I can get hold of timing light, comp gauge and vacuum gauge and fuel pressure gauges
what does everone think


A group fault finding day.  Not a bad idea and we might be able to solve our friends problem with some hands on work.

I was trying to organise something like this with Scott at Corvette Alterations in August but we only had 1 or 2 takers.  We needed 20 for it to happen. CLICK ME

May be we could still organise it and implement these basic lessons into it as well.

We would have a venue and Scott said he would put the food on.  


Just a thought.

But I do like your idea.

Cam ;42
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Offline 77CVT

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« Reply #26 on: June 28, 2006, 12:57:22 PM »
Quote
p.s. - 77CVT, I don't think any of the Ratpackians have set an ET starting with a 12 yet (not that I can talk). ;53


I thought he snuck in with a 12.8 or 9 at your last drag day?  No doubt he'll jump in a correct me if I'm mistaken! ;-)
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Offline SC

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« Reply #27 on: June 28, 2006, 04:39:24 PM »
there was a 12.9 set by a big block but i dont think he is part of the rat pack
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Offline BOSCHVETTE

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« Reply #28 on: June 29, 2006, 07:10:26 AM »
77CVT, I don't think any of the Ratpackians have set an ET starting with a 12 yet (not that I can talk). ;53 [/quote]



vo i have seen you run a mid 12 and you did it easy
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New toy about to breath life and we will have a strangle hold on the leadfoot forever 850hp 1150kg Australian sports sedan series here we come.
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450 RWHP WITH MORE TORQUE THAN MUNDINE
BUT IT LOOKS LIKE YOU HAVE BOUGHT A BAG OF ROCKS TO A GUN FIGHT.....

Offline 87Z51

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« Reply #29 on: June 29, 2006, 05:36:00 PM »
As they say , when the flag drops the BS stops  and the BS is thick on the ground round here from the Rat pack dribbling.
Other than Steve ( SR ) distinctive lack of BB Vettes seen at dragstrip.
Lots of "I've got a squillon Hp and a big dick" but  not prepared to put their money where the mouth is against a few little mice motors.
It must be that magic voodoo
"If I take my car to the strip I might break something".

How about a little DYO?
Mice motored Vette's won both classes at the last V8 Owner's track day ,rat powered cars very welcome to attend.

'87 C4, A4 3.07.
 100,000 mile heads never been off L98.
12.98X in street trim. 1.75 60 ft
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Offline SC

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« Reply #30 on: June 30, 2006, 03:59:47 PM »
has a member of the rat pack ever ran at the drags ever? and who was it
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Offline Vette Obsessed

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HELP....my so called performance slug
« Reply #31 on: June 30, 2006, 04:39:10 PM »
Quote
Originally posted by SC
has a member of the rat pack ever ran at the drags ever? and who was it


We're getting a little off track here but for what it's worth the only Rat Pack member to run at the drags is MR69ER. ;42 to him for getting out there and having some fun - which is what this whole "us vs them - Rat Pack vs the Mice" thing is about. ;-)
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Offline SC

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« Reply #32 on: June 30, 2006, 09:53:15 PM »
yes we are off track again
mrvett have you done a comp test and what are the results as i am curious
you never said how many km/miles are on the clock
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Offline BOSCHVETTE

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« Reply #33 on: July 01, 2006, 06:47:20 AM »
what colour is the car ?
it must not be red,cause red ones go faster,

you could understand if it was a banana coloured rat powered vette and it lacked grunt.
(sorry can not help myself);43;43;43;43;43
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New toy about to breath life and we will have a strangle hold on the leadfoot forever 850hp 1150kg Australian sports sedan series here we come.
Z06 sports sedan about to be semi retired.
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BUT IT LOOKS LIKE YOU HAVE BOUGHT A BAG OF ROCKS TO A GUN FIGHT.....

Offline Cameron 77C3

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HELP....my so called performance slug
« Reply #34 on: July 01, 2006, 11:06:50 AM »
Thats strike One. ;53
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Offline 86er

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« Reply #35 on: July 01, 2006, 12:07:30 PM »
I think that a discussion day like the one suggested would be great, it wpould allow us all to get more familiar with the car we own & share experiences etc
Should it be raised at the next meeting as it could be a regular thing?
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Offline mrvett

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« Reply #36 on: July 01, 2006, 01:23:54 PM »
Quote
Originally posted by SC
yes we are off track again
mrvett have you done a comp test and what are the results as i am curious
you never said how many km/miles are on the clock


havnt done a comp test...118,000mile on clock
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Offline mrvett

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« Reply #37 on: July 01, 2006, 01:25:57 PM »
Quote
Originally posted by BOSCHVETTE
what colour is the car ?
it must not be red,cause red ones go faster,

you could understand if it was a banana coloured rat powered vette and it lacked grunt.
(sorry can not help myself);43;43;43;43;43


boshie it is red but jst a red pig in fact ;41
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Offline mrvett

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« Reply #38 on: July 01, 2006, 01:41:10 PM »
ok ok...i went to calder park last night in melb cause thats were mrvett lives. now all i wanted was to run a 13second quarter. all i got though was a 14.02 at 95.32mph.

now i am a little disaponited but i did feel better when my mate geoff reminded me my car didnt do that well on the dyno to begin with..haha

so i reckon it aint bad for a stock 87engine with jst a throttle body, fuel reg, exhaust, and 3.73gear ratio...but i stil want that 13 :b4 ;laugh
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Offline 87Z51

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« Reply #39 on: July 01, 2006, 10:43:38 PM »
"straight through mufflers, removed the two pre cats but kept the larger cat in the middle "

Something is wrong.
My original '87 engine 120,000+ miles with no pre cats ,hiflow main cat and eliminators went 14.0 -14.1 with stock 3.07s.
Taking out the main cat dropped it to 13.9.

With a stock TPI and 3.73s I would guess you have no useful revs in 1st and be running out of revs in 3rd across the line.
What cond is your main cat in?
Does the engine rev freely under load?
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