...perhaps you just need a different cam or rear gear to go with the mini ram header combo?
Not Happy!!
Thread Starter
Intermediate
Joined: Feb 2003
Posts: 45
Likes: 0
From: Roselle Park NJ
Not Happy!!
If anyone read the thread from a few days ago that was bashing TPIS I left a post that said i would put my results up of my times after installing the mini-ram and headers....well take a look at my time slip before the install.
.401 R/T
1.862 60ft.
13.81 1/4 @96.8mph
Now this is my slip after everything installed with the same size injectors(#24) and same timing with 48mm T/B and the car weighed in almost excatly the same(3255)...
.413 R/T
2.070 60ft.
9.065 1/8@ 77.96mph
14.035 1/4 @99.44 mph
all I can say is that there better be something stupid i'm not seeing thats slowing this car down THAT MUCH...oh and to make this story that much better, my fan relay took a crap on the way to the track so i had to wedge a dime in there lol....ughh, just not a good night
.401 R/T
1.862 60ft.
13.81 1/4 @96.8mph
Now this is my slip after everything installed with the same size injectors(#24) and same timing with 48mm T/B and the car weighed in almost excatly the same(3255)...
.413 R/T
2.070 60ft.
9.065 1/8@ 77.96mph
14.035 1/4 @99.44 mph
all I can say is that there better be something stupid i'm not seeing thats slowing this car down THAT MUCH...oh and to make this story that much better, my fan relay took a crap on the way to the track so i had to wedge a dime in there lol....ughh, just not a good night
Thread Starter
Intermediate
Joined: Feb 2003
Posts: 45
Likes: 0
From: Roselle Park NJ
well my launch wasn't that great, i think i can get it back down to 1.8 because i did spin a bit with the 2.0...the biggest thing i noticed was that i could pick my head up by the end of second gear as if it had no pull left in it then 3rd kicked it down and it felt like it lost power again. its taking quite some time to go through second and third.btw it's an automatic. IMO i think i can get the same time as i did with the tpi setup but i should be way faster with this now right? oh and fuel pressure is set at 47psi
and i did put 3:54's in and changed the cam to prepare for the mini-ram/headers
and i did put 3:54's in and changed the cam to prepare for the mini-ram/headers
Last edited by 86malcomekonnner; Aug 15, 2007 at 10:27 PM.
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Race Director
Joined: Aug 2000
Posts: 14,130
Likes: 7
Cruise-In II Veteran
Never mind,Im editing this,I see you said its an automatic.
IF it is an automatic,at least 2800+stall and 3.73 gears are what TPIS suggest for their miniram.
You also have no prom work done...that may have some effect but until you do it,no one knows whats gonna work.You picked up 3mph so there is some HP coming into play,but do agree something seems amiss despite your times and mph/power.
Basically,you turned your L98 into an LT1 with your mods I could grasp but dont assume youre gonna run 12's,low 13's out of the box with a cam and MR change alone with no other changes.
IF it is an automatic,at least 2800+stall and 3.73 gears are what TPIS suggest for their miniram.
You also have no prom work done...that may have some effect but until you do it,no one knows whats gonna work.You picked up 3mph so there is some HP coming into play,but do agree something seems amiss despite your times and mph/power.
Basically,you turned your L98 into an LT1 with your mods I could grasp but dont assume youre gonna run 12's,low 13's out of the box with a cam and MR change alone with no other changes.
Intermediate
Joined: May 2007
Posts: 37
Likes: 0
I agree that you will need to do more tuneing to get the most out of your new combo. But, if your 60' was the same as your base line pass your ET would have been in the 13.60's. It looks like you roughly picked up 30 HP.
Thread Starter
Intermediate
Joined: Feb 2003
Posts: 45
Likes: 0
From: Roselle Park NJ
like i said i think i can get my 60' back to 1.8 if i dont spin...i only lost .2 on the 60' how is that going to drop me .4 in the 1/4???? and why would i need 3:73's if i'm getting off the line as good as i am? There is a problem somewhere with the engine it self. i should have picked up at least .2 or .3 without tuning anything with the combo i have regardless of gear or cam size...what fuel pressure should i be running at with the #24 injectors?
Burning Brakes
Joined: Dec 2006
Posts: 936
Likes: 2
From: Tyrone PA
Your shift RPM is?????? That is the big thing here. The TPI likes to shift at 5K or before. Some see good results shifting at 4400, with minor mods to get more air in (portwork, 1.6 rockers, cam) you could shift around 5000, tops. With the miniram, you need to be shifting at at least 6000. If your governor is stock and you are letting the car shift for you, it is shifting when you still have lots of power left, which kills the ET. Also, the RPM's will be below your powerband when you hit the next gear, which is probably why it seems like it takes forever to get through the gear.
Race Director
Joined: Sep 2003
Posts: 16,838
Likes: 341
From: Database Error Indiana
Also, the Miniram requires a lot more advance at low RPM than the tpi.
I went to the 1/8 mile track after installing the Mini, only changing fuel pressure and advancing the timing and equalled the big runner/Edelbrock base et numbers on the third pass .(86 mph). Also raised the MPH numbers first pass. Waiting to get the tune nailed down to go back.
Last edited by JackDidley; Aug 16, 2007 at 06:51 PM.
Instructor
Joined: Jul 2007
Posts: 174
Likes: 0
From: Toronto Ontario
Ratchet shifter, higher stall conv, transmission rebuild kit
Replace conv. to higher stall rate, install ratchet style shifter, rebuild tranny with pro series transmission rebuild kit. You'll get quicker shifts and control your shift points using after market tach with shift light. Also don't forget to use the purple stuff for tranny fluid.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by 86malcomekonnner
and why would i need 3:73's if i'm getting off the line as good as i am?
i should have picked up at least .2 or .3 without tuning anything with the combo i have regardless of gear or cam size...
i should have picked up at least .2 or .3 without tuning anything with the combo i have regardless of gear or cam size...
You can't blame TPiS or any one else for that mistake, unless it was a parts combo they recommended.
Also, any time you make changes, you have to dial in the rest of the car to accommodate them.
RACE ON!!!
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
The cam is the "prom" of the engine. By changing it, you have altered the torque curve of the engine. The same driving techniques aren't getting you out of the hole as quickly as those same techniques did with an engine with more bottom end torque. Your cam has shifted the torque higher up the rpm scale. In order to work properly, modifications have to be carefully coordinated. It is surprisingly easy to cam the engine to make power in an rpm range that the intake can't feed. Then you end up with a super narrow range of (reduced) power, where the wild cam kills the bottom end and the intake (and maybe other components) choke off where the cam wants to start go to work.
You can't blame TPiS or any one else for that mistake, unless it was a parts combo they recommended.
Also, any time you make changes, you have to dial in the rest of the car to accommodate them.
RACE ON!!!
You can't blame TPiS or any one else for that mistake, unless it was a parts combo they recommended.
Also, any time you make changes, you have to dial in the rest of the car to accommodate them.
RACE ON!!!
A matched combination is the key to a great performing car proper tuning and appropriate shift points are a big part of the equation.