TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
Sponsored by:
Sponsored by:

Finally some 1/4 times! Whatcha think?

Thread Tools
 
Search this Thread
 
Old 05-16-2004, 09:57 PM
  #1  
Supreme Member

Thread Starter
iTrader: (4)
 
Wishmaster's87IROC's Avatar
 
Join Date: Feb 2000
Location: Winston salem, NC
Posts: 2,850
Likes: 0
Received 0 Likes on 0 Posts
Car: 1987 1SICIROC.....1999 TransAm
Engine: 385 HSR.....LS1
Transmission: 700R4 with Midwest 3400 2.4str...M6
Axle/Gears: SLP Zexel Posi unit 3.42's...3.73's
Finally some 1/4 times! Whatcha think?

Well I finally made it to a 1/4 mile track to see what all my work did for me. Before my best was 15.4 ...

Today was 14.23 at 97......good? That equates to more than what my dyno was at 224.....so Im thinking I have more than that...you think? The charts say Im in the 245 range..does that sound right?

Check out my dial in....I made it to the T! but lost it on my crappy R/T......PRO TREE SUCKS! I couldnt get the hang of it...I even went and tried to protest it but no chance so I bought back in and lost again on my R/T....My 60's stayed consistent all day in the 2.0 range. How in the hell are you guys getting sub 2 sec 60's on street tires and stock verters? I wasnt spinning at all that I could tell...

My 1/8th times were even better than my best at the local track of 9.299

Whatcha think about my timeslip....anything I can do to cut some more off the times? Do you think runners? MSD box...what? Im open for some ideas....

thanks guys!
Attached Thumbnails Finally some 1/4 times! Whatcha think?-dsc01173.jpg  

Last edited by Wishmaster's87IROC; 05-16-2004 at 10:00 PM.
Old 05-16-2004, 10:00 PM
  #2  
Member

 
PhilM's Avatar
 
Join Date: Aug 2002
Location: Carlisle, PA
Posts: 490
Likes: 0
Received 0 Likes on 0 Posts
Car: Accepting applications...
that's a shame to run dead on and get beat by someone who is 2 tenths off...practice practice practice practice practice practice...

and practice some more...

not a TPI expert but an MSD is always a worthy investment
Old 05-16-2004, 10:32 PM
  #3  
Supreme Member

 
jfreeman74's Avatar
 
Join Date: Sep 2001
Location: Flowery Branch, GA
Posts: 1,195
Likes: 0
Received 0 Likes on 0 Posts
Car: 1985 Iroc-Z
Engine: 1 BA 305 TPI
Transmission: Probuilt 700R4 - 2800 Stall Midwest
Axle/Gears: 3.42
Good job man. You're only a torque converter away from 13's.
Old 05-16-2004, 10:55 PM
  #4  
Senior Member

iTrader: (1)
 
Brent's Avatar
 
Join Date: Jul 1999
Location: PA
Posts: 921
Likes: 0
Received 1 Like on 1 Post
You're only a torque converter away from 13's.
One nice example
Old 05-17-2004, 01:51 PM
  #5  
Supreme Member

Thread Starter
iTrader: (4)
 
Wishmaster's87IROC's Avatar
 
Join Date: Feb 2000
Location: Winston salem, NC
Posts: 2,850
Likes: 0
Received 0 Likes on 0 Posts
Car: 1987 1SICIROC.....1999 TransAm
Engine: 385 HSR.....LS1
Transmission: 700R4 with Midwest 3400 2.4str...M6
Axle/Gears: SLP Zexel Posi unit 3.42's...3.73's
what about some type of bolt-on?
Old 05-17-2004, 09:22 PM
  #6  
Supreme Member
 
D Stroy H8's Avatar
 
Join Date: Jan 2002
Location: Las Vegas, NV
Posts: 1,370
Likes: 0
Received 0 Likes on 0 Posts
Car: 1990 Iroc-Z
Engine: L98
Transmission: 700R4
A TC is a bolt on. It'll be the best bang for the buck - 2 or 3 tenths off your ET.
Old 05-17-2004, 09:55 PM
  #7  
Supreme Member

Thread Starter
iTrader: (4)
 
Wishmaster's87IROC's Avatar
 
Join Date: Feb 2000
Location: Winston salem, NC
Posts: 2,850
Likes: 0
Received 0 Likes on 0 Posts
Car: 1987 1SICIROC.....1999 TransAm
Engine: 385 HSR.....LS1
Transmission: 700R4 with Midwest 3400 2.4str...M6
Axle/Gears: SLP Zexel Posi unit 3.42's...3.73's
yeah I know I can get 2 to 3 or more with a TC...but what about other bolt ons?
Old 05-18-2004, 02:08 AM
  #8  
Supreme Member
 
D Stroy H8's Avatar
 
Join Date: Jan 2002
Location: Las Vegas, NV
Posts: 1,370
Likes: 0
Received 0 Likes on 0 Posts
Car: 1990 Iroc-Z
Engine: L98
Transmission: 700R4
Well uh... u/d pulleys work well, when they are done correctly.
ALso, some SLP runners cleaned up a little with a ported stock base will work well too.
Old 05-18-2004, 10:39 AM
  #9  
Supreme Member

iTrader: (10)
 
NufNuffZ28's Avatar
 
Join Date: Dec 2000
Location: NC
Posts: 1,901
Received 43 Likes on 30 Posts
Car: 1987 Iroc
Engine: 357 Single plane and a Ysi vortech
Transmission: T56
Axle/Gears: 3.50 9"
Good times man!!

I would have to agree that a torque converter would do wonders.
I have a Coan converter and my fiancee had a Vigilante and mine is just as good if not better than heres. (1.59 on Nitto 245/50r16 NA)
What does your exhaust consist of again?

Also bolt on a NX kit and go mid 12's ALL day

Chris
Old 05-18-2004, 10:50 AM
  #10  
Senior Member

 
N8MAN1068's Avatar
 
Join Date: Aug 2001
Location: fredericksburg, va
Posts: 610
Likes: 0
Received 0 Likes on 0 Posts
Car: 85 ta ws6 KITT
Engine: Lb9
Transmission: th350
unbolt the front sway bar, bolt in some LCA's. help xfer weight and plant.

what tires are you running? stock? what pressure? try lowering the pressure a bit too.
Old 05-18-2004, 10:55 AM
  #11  
Supreme Member

Thread Starter
iTrader: (4)
 
Wishmaster's87IROC's Avatar
 
Join Date: Feb 2000
Location: Winston salem, NC
Posts: 2,850
Likes: 0
Received 0 Likes on 0 Posts
Car: 1987 1SICIROC.....1999 TransAm
Engine: 385 HSR.....LS1
Transmission: 700R4 with Midwest 3400 2.4str...M6
Axle/Gears: SLP Zexel Posi unit 3.42's...3.73's
my exhaust is....SLP headers going to the SLP yipipe going to a 3" pipe where my CAT used to be and then from there is the factory 2 3/4" pipe...I think...and then to a Flowmaster.


Im running 26" Dayton street tires set at 24lbs. I dont get but a little chirp when leaving the line.
Old 05-18-2004, 01:51 PM
  #12  
Senior Member

 
omcrider's Avatar
 
Join Date: Mar 2003
Location: Oakland Ca.
Posts: 864
Likes: 0
Received 0 Likes on 0 Posts
Car: 1988 GTA
Engine: 5.7L/L98
Transmission: 700r4
Base and runners, would be a next good mod for you. I also agree with the tq converter. Those are great times for a 305 with bolt ons
Old 05-18-2004, 02:47 PM
  #13  
Supreme Member

Thread Starter
iTrader: (4)
 
Wishmaster's87IROC's Avatar
 
Join Date: Feb 2000
Location: Winston salem, NC
Posts: 2,850
Likes: 0
Received 0 Likes on 0 Posts
Car: 1987 1SICIROC.....1999 TransAm
Engine: 385 HSR.....LS1
Transmission: 700R4 with Midwest 3400 2.4str...M6
Axle/Gears: SLP Zexel Posi unit 3.42's...3.73's
But I heard that aftermarket or even just ported base and/or runners would take away what lowend I have. It doesnt feel like I got alot now so I wouldnt want to loose anymore....

If putting some SLP runners would help then I wuld do that and then look for an aftermarket or ported/polished intake.


what do you think?
Old 05-18-2004, 03:34 PM
  #14  
RMK
Moderator

 
RMK's Avatar
 
Join Date: Apr 2000
Posts: 2,337
Received 2 Likes on 2 Posts
Car: 87 IROC
Engine: modded LB9
Transmission: Pro Built 700R4
Intake and runners. I have aftermarket intake/runners on my 305 and I did lose some low end, but then it does rev to over 5000rpm at the other end. It pulls well. I'll hopefully have the dyno numbers and track times for my combo this year.

Robert
Old 05-18-2004, 03:39 PM
  #15  
Senior Member

 
omcrider's Avatar
 
Join Date: Mar 2003
Location: Oakland Ca.
Posts: 864
Likes: 0
Received 0 Likes on 0 Posts
Car: 1988 GTA
Engine: 5.7L/L98
Transmission: 700r4
It may move your power band slightly but it can only help your overall performance to get more air into the cylinders. Breath in breath out, increase the ability for your engine to do either will improve performance.
Old 05-18-2004, 03:44 PM
  #16  
Supreme Member

Thread Starter
iTrader: (4)
 
Wishmaster's87IROC's Avatar
 
Join Date: Feb 2000
Location: Winston salem, NC
Posts: 2,850
Likes: 0
Received 0 Likes on 0 Posts
Car: 1987 1SICIROC.....1999 TransAm
Engine: 385 HSR.....LS1
Transmission: 700R4 with Midwest 3400 2.4str...M6
Axle/Gears: SLP Zexel Posi unit 3.42's...3.73's
When I dynoed the car I was still at 8* in timing and forgot to take the screens where the fog lights used to be...and I dyno'ed at 224....

So now I have it set to 10* and always remove my screens when I drag....

WHen I punch in my weight 3475/w me and my times, they come up with 249hp and 311tq..........is that correct or are the charts off a bit?
Old 05-18-2004, 03:58 PM
  #17  
Senior Member

 
omcrider's Avatar
 
Join Date: Mar 2003
Location: Oakland Ca.
Posts: 864
Likes: 0
Received 0 Likes on 0 Posts
Car: 1988 GTA
Engine: 5.7L/L98
Transmission: 700r4
Originally posted by Wishmaster's87IROC
When I dynoed the car I was still at 8* in timing and forgot to take the screens where the fog lights used to be...and I dyno'ed at 224....

So now I have it set to 10* and always remove my screens when I drag....

WHen I punch in my weight 3475/w me and my times, they come up with 249hp and 311tq..........is that correct or are the charts off a bit?
Those types of calculations can only give you a rough estimate. To many factors besides weight and hp combine to give you your actual 1/4 times. I don't think 2* difference in base timing and screens will affect your dyno results to much.
Old 05-23-2004, 03:48 PM
  #18  
TGO Supporter

 
nick418's Avatar
 
Join Date: Apr 2004
Location: Massachusetts
Posts: 4,224
Likes: 0
Received 0 Likes on 0 Posts
Car: 91 Z28 & 21 Hellcat Challenger
Engine: L98, Hemi 6.2
sweet

Last edited by nick418; 08-17-2004 at 05:12 PM.
Old 05-23-2004, 07:37 PM
  #19  
Supreme Member

 
jfreeman74's Avatar
 
Join Date: Sep 2001
Location: Flowery Branch, GA
Posts: 1,195
Likes: 0
Received 0 Likes on 0 Posts
Car: 1985 Iroc-Z
Engine: 1 BA 305 TPI
Transmission: Probuilt 700R4 - 2800 Stall Midwest
Axle/Gears: 3.42
Originally posted by omcrider
It may move your power band slightly but it can only help your overall performance to get more air into the cylinders. Breath in breath out, increase the ability for your engine to do either will improve performance.
Correct, and you can get the torque converter based off your new power band. So if the torque peak moves up then just get a bigger convertor.
Old 05-27-2004, 12:29 AM
  #20  
Supreme Member

iTrader: (1)
 
nape's Avatar
 
Join Date: Aug 2003
Location: SW Chicago 'burbs
Posts: 1,428
Likes: 0
Received 0 Likes on 0 Posts
Car: American Iron Firebird
Engine: The little 305 that could.
Transmission: Richmond T-10
Axle/Gears: Floater 9" - 3.64 gears
Lower control arms and relocation brackets. You'll definately need the LCARBs because your car is lowered.

I cut a consistant 1.9xs on cheapie 245/50/16 Kumho 711s with LCAs and a converter.
Old 05-27-2004, 05:03 PM
  #21  
Supreme Member

Thread Starter
iTrader: (4)
 
Wishmaster's87IROC's Avatar
 
Join Date: Feb 2000
Location: Winston salem, NC
Posts: 2,850
Likes: 0
Received 0 Likes on 0 Posts
Car: 1987 1SICIROC.....1999 TransAm
Engine: 385 HSR.....LS1
Transmission: 700R4 with Midwest 3400 2.4str...M6
Axle/Gears: SLP Zexel Posi unit 3.42's...3.73's
yeah I was thinking about getting a set of LCA and some BMR relocation brackets. Im not getting any wheel spin though and I thought that lowered cars get wheel spin bad...but not me. That might be cause I lower my tier pressure all the way down to 25lbs. So do the RB's help in the transfer of the weight?
Old 05-28-2004, 10:52 AM
  #22  
Senior Member

 
Dano 00TA's Avatar
 
Join Date: Mar 2001
Location: Gary, Indiana
Posts: 560
Likes: 0
Received 0 Likes on 0 Posts
Car: 00 Trans Am/89 IROC
Engine: LS1/L98
Transmission: 4L60/700R4
I gotta agree with the people saying converter. I know I'm giving results from a LS1 but my Midwest 3200 dropped an easy 3-4 tenths off my time and 2+tenths off my 60ft time. Mph might have dropped maybe 1-2 but it's well worth it imo and is completly streetable


Or even with a flowmaster, a cutout might give you a little gain. I picked up .15 sec over a closed exhaust on my TA and even if it only gives you .1 or .05 for 30 bucks it's worth it.

Last edited by Dano 00TA; 05-28-2004 at 10:56 AM.
Old 05-28-2004, 03:08 PM
  #23  
Member
 
mikobu3's Avatar
 
Join Date: Feb 2003
Posts: 234
Likes: 0
Received 0 Likes on 0 Posts
wishmaster97

not sure if you ported and polished your heads add some 1.94 intake valves new springs , you will see another 35 hp , also get a 3 angle valve job done

good times
Old 05-28-2004, 03:26 PM
  #24  
Supreme Member

 
vwdave's Avatar
 
Join Date: Feb 2002
Location: miami, florida
Posts: 1,843
Likes: 0
Received 0 Likes on 0 Posts
Its only a 305, I doubt he would notice THAT much of a difference with ported heads.

I would suggest a converter. I have a corvette unit in mine and the car has a freaknasty launch compaired to before.
Old 05-30-2004, 07:18 AM
  #25  
Member
 
mikobu3's Avatar
 
Join Date: Feb 2003
Posts: 234
Likes: 0
Received 0 Likes on 0 Posts
vwdave

don;t notice anything with ported heads ,

thats got to be the stupist thing i heard on here, thats how you get a 305 in the 300 hp area brother , matching a good cam to better heads makes the power

like i said before , there are way to many kids on this forum , post correct info next time
Old 05-30-2004, 07:23 AM
  #26  
Supreme Member

 
vwdave's Avatar
 
Join Date: Feb 2002
Location: miami, florida
Posts: 1,843
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by mikobu3
vwdave

don;t notice anything with ported heads ,

thats got to be the stupist thing i heard on here, thats how you get a 305 in the 300 hp area brother , matching a good cam to better heads makes the power

like i said before , there are way to many kids on this forum , post correct info next time
I didnt say "you wont notice anything." I meant you probably would not get 35hp from ported stock heads on a mostly stock 305. 15hp I could understand, but not 35. Unless you can provide proof otherwise (dyno or flowbench data), I will continue not to believe it. Please stop trying to talk down to me. I might just know a thing or two.

Last edited by vwdave; 05-30-2004 at 07:26 AM.
Old 05-31-2004, 08:09 PM
  #27  
Member
 
mikobu3's Avatar
 
Join Date: Feb 2003
Posts: 234
Likes: 0
Received 0 Likes on 0 Posts
20 hp porting and polishing and another 10-15 with bigger 1.94 intake valves and better springs
Old 05-31-2004, 08:40 PM
  #28  
Supreme Member

Thread Starter
iTrader: (4)
 
Wishmaster's87IROC's Avatar
 
Join Date: Feb 2000
Location: Winston salem, NC
Posts: 2,850
Likes: 0
Received 0 Likes on 0 Posts
Car: 1987 1SICIROC.....1999 TransAm
Engine: 385 HSR.....LS1
Transmission: 700R4 with Midwest 3400 2.4str...M6
Axle/Gears: SLP Zexel Posi unit 3.42's...3.73's
Originally posted by mikobu3
wishmaster97

not sure if you ported and polished your heads add some 1.94 intake valves new springs , you will see another 35 hp , also get a 3 angle valve job done

good times
actually your not the only one to tell me that. I talked to a guy when I was looking for a place to get my exhaust put on and he asked if I had my heads ported when I did the cam, I told him no and he said I was freakin crazy for not doing that since I was right there at them. He even said that I could have gained another easy 35HP from doing that. He knows a guys that would only charge me $175 to port them and do the angle job thingy...I have no idea what thats all about but he did mention the angle job thing and sizes. I may if I feel like tearing back into the motor do that when the winter time comes and I will also yank out the LT1 and put something in there better. Which I should have done in the first place but, LIVE AND LEARN!
Old 06-01-2004, 11:22 AM
  #29  
Member
 
mikobu3's Avatar
 
Join Date: Feb 2003
Posts: 234
Likes: 0
Received 0 Likes on 0 Posts
wishmaster

i recently put in a comp xe 212 218 449 456 112lsa cam and there kit ,

ported and polished the 416 heads with bigger 1.94 intake valves , new comp springs, retainers, 3 angle valve job ,

dynomax headers , with a crappy y-pipe , 3.42 gears and only 20 000 original miles on the 86 305 tpi ,, oh yeh i ported the base

still using the stock fuel pressure , timing is not correct , i think the iac is not set up , but let me tell you the car moves well ,

i need to get it tuned up properly , that 14.2 sounds great to me
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
evilstuie
Tech / General Engine
22
01-09-2020 08:29 PM
aaron7
Interior
18
08-17-2016 06:02 PM
Red iroc-z 305
Tech / General Engine
8
09-30-2015 05:22 PM
Polo Z03
Auto Detailing and Appearance
7
09-10-2015 06:43 PM
86IROC112
TPI
12
08-21-2015 07:20 PM



Quick Reply: Finally some 1/4 times! Whatcha think?



All times are GMT -5. The time now is 03:07 PM.