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Was I too Optimistic ? TPI L98 Power

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Old 02-05-2016, 07:30 PM   #51  
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Re: Was I too Optimistic ? TPI L98 Power

Seems that the new ACDelco O2 sensor fixed the knock count problem.

The last thing now is I really Really Really wish I had them rebuild my stock converter... The stall on this exchange / rebuild is just way too low... Belongs in a truck.
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Old 02-05-2016, 08:33 PM   #52  
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Re: Was I too Optimistic ? TPI L98 Power

Time to swap it out? Have you chatted with the folks that did your trans about it??
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Old 02-05-2016, 10:01 PM   #53  
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Re: Was I too Optimistic ? TPI L98 Power

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Seems that the new ACDelco O2 sensor fixed the knock count problem.

The last thing now is I really Really Really wish I had them rebuild my stock converter... The stall on this exchange / rebuild is just way too low... Belongs in a truck.
Trucks typically have loose converters. That way you can take off with a large load and not bog the engine.

-- Joe
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Old 02-05-2016, 11:03 PM   #54  
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Re: Was I too Optimistic ? TPI L98 Power

I'm just going to put up with it for now... I drives great but I swear the convertor is locked up at about 900 rpm. I did the motor / trans swap by myself in the driveway.... I'm still having re-occuring nightmares,,, and my hands/knuckles have just healed up.
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Old 02-07-2016, 05:01 PM   #55  
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Re: Was I too Optimistic ? TPI L98 Power

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I'm just going to put up with it for now... I drives great but I swear the convertor is locked up at about 900 rpm. I did the motor / trans swap by myself in the driveway.... I'm still having re-occuring nightmares,,, and my hands/knuckles have just healed up.
More patience than I ..

The last transmission I did on my back, I think I was 18. I've had a lift since about 19 or 20.

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Old 02-24-2018, 09:28 AM   #56  
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Re: Was I too Optimistic ? TPI L98 Power

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Timing Set static with brown wire disconnected at 6 degrees ADV. I'll do the cranking compression today and try to get ahold of a fuel pressure gauge.



I 've had TPI cars before, Vette's and Firebirds... This just really seems to fall short. My 91 TPI Frebird had the 3:08 gears, was bone stock and would light the tires from a stop. This one is 3:23's and pulls away from a stop like a V6 Camry.
As nice as fuel injection is . I still run carb. You cant beat it for off the line grunt and power.injection may get better milage, but who cares, were talking performance.you cant beat a carb dumping a butt load of fuel all at once to get a car moving! I have a 72 grand prix 463 cid 750 double pumper Holley . It leaves the line hard as hell. Run 12:40s all day.
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Old 02-25-2018, 08:33 AM   #57  
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Re: Was I too Optimistic ? TPI L98 Power

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As nice as fuel injection is . I still run carb. You cant beat it for off the line grunt and power.injection may get better milage, but who cares, were talking performance.you cant beat a carb dumping a butt load of fuel all at once to get a car moving! I have a 72 grand prix 463 cid 750 double pumper Holley . It leaves the line hard as hell. Run 12:40s all day.
You have got to be joking! My 2011 Infiniti M56S has been 12.2 @ 112 at 4,500 lbs race weight. The 338 CID V8 has not been touched save for intake, exhaust and tuning. The injection system is very capable as this one sprays fuel directly into the chamber at about 2,500 psi during the compression stroke.
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Old 02-25-2018, 09:02 AM   #58  
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Re: Was I too Optimistic ? TPI L98 Power

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As nice as fuel injection is . I still run carb. You cant beat it for off the line grunt and power.injection may get better milage, but who cares, were talking performance.you cant beat a carb dumping a butt load of fuel all at once to get a car moving! I have a 72 grand prix 463 cid 750 double pumper Holley . It leaves the line hard as hell. Run 12:40s all day.
You think a a processor that can execute over two million instructions per second reading from a TPS sensor, and injectors that atomize fuel precisely, can't do it better and faster than an accelerator pump?


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Old 06-06-2018, 11:39 AM   #59  
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Re: Was I too Optimistic ? TPI L98 Power

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As nice as fuel injection is . I still run carb. You cant beat it for off the line grunt and power.injection may get better milage, but who cares, were talking performance.you cant beat a carb dumping a butt load of fuel all at once to get a car moving! I have a 72 grand prix 463 cid 750 double pumper Holley . It leaves the line hard as hell. Run 12:40s all day.
Here hold my beer!

Fuel Injection Makes more Power... period.
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Old 06-07-2018, 12:31 AM   #60  
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Re: Was I too Optimistic ? TPI L98 Power

It is true that carburetors have excellent throttle response. My injectors max out at 60% duty cycle so I can get all the fuel in before valve closes, even at 7000 rpm. I have no trouble matching the throttle response of a carburetor.

And I have a wide-band O2 sensor with closed loop compensation during acceleration so the fueling is always spot on. Can't do that with your carburetor.

Last edited by QwkTrip; 06-07-2018 at 12:43 AM.
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Old 06-07-2018, 07:35 PM   #61  
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Re: Was I too Optimistic ? TPI L98 Power

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My 2011 Infiniti M56S has been 12.2 @ 112 at 4,500 lbs race weight.
That's crazy! What a sleeper.
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Old 06-08-2018, 07:30 AM   #62  
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Re: Was I too Optimistic ? TPI L98 Power

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That's crazy! What a sleeper.
My department boss has an audi rs7 that goes 10.6’s on 21” wheels lol. 4700 lbs somewhere around that
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Old 06-12-2018, 09:33 PM   #63  
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Re: Was I too Optimistic ? TPI L98 Power

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My department boss has an audi rs7 that goes 10.6s on 21 wheels lol. 4700 lbs somewhere around that
Pretty sure any one of us could make our third gens faster than the for way less than 130k tho, lol!
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Old 06-13-2018, 06:08 AM   #64  
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Re: Was I too Optimistic ? TPI L98 Power

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Pretty sure any one of us could make our third gens faster than the for way less than 130k tho, lol!
But you will never have the luxury and electronics that car does. It still be a flexy squeaky rattling thirdgen fbody haha
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Old 06-13-2018, 07:06 PM   #65  
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Re: Was I too Optimistic ? TPI L98 Power

I guess you're right, but our cars are still cooler
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Old 06-14-2018, 07:18 AM   #66  
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Re: Was I too Optimistic ? TPI L98 Power

Speed isn't everything. If it is, there is always someone faster. Cars start to lose their fun to drive factor as it slowly gets converted over to pure straight line performance.

It's supposed to be about how it makes you feel when you drive.
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Old 06-15-2018, 07:27 PM   #67  
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Re: Was I too Optimistic ? TPI L98 Power

The faster cars I've had stayed tore up a lot. I've enjoyed cruising in my L03 for a while but I'm working on a L98 to put in next year. Got bored i guess. Hope I don't regret it later.
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Old 06-15-2018, 10:40 PM   #68  
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Re: Was I too Optimistic ? TPI L98 Power

I don't know how you can regret an L98. It's still docile as a bunny.
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Old 06-16-2018, 10:38 AM   #69  
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Re: Was I too Optimistic ? TPI L98 Power

True. Just hope it's as trouble free as the lil fellow in there now.
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