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Re: RacePak EGT's Q's [Re: Tig] #3065264
08/04/22 05:10 PM
08/04/22 05:10 PM
Joined: Jan 2003
Posts: 18,593
Las Vegas
Al_Alguire Offline
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Al_Alguire  Offline
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Joined: Jan 2003
Posts: 18,593
Las Vegas
Have not seen a tunnel ram yet that did not benefit from staggering the jetting, and even the bleeds. They are much more tunable than a single 4 in that respect for sure. I have run a number of tunnel ram deals just have not used a cast intake for it in years. We struggle trying to make all 8 happy with a single 4 deal on the heads up car but there are ways there as well. Knowing how to use those 3,4,5 circuit carbs to bias mixtures in those set ups help a lot. We also have different boosters in each hole to help with mixture issues. Its a process for sure

I have been thinking of going away from the racepak stuff and going to Holley systems to monitor all logging. I particularly like their dashes better than racepak. I Have not made the jump yet but thinking on it pretty hard. As for racepak expense it can be pretty stiff. But Low Dollar Motorsports sells alot of those pieces(sensors)for less money.


"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"
Re: RacePak EGT's Q's [Re: Al_Alguire] #3065266
08/04/22 05:26 PM
08/04/22 05:26 PM
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JERICOGTX Offline
master
JERICOGTX  Offline
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MN
When you jump ship Al, keep me in mind. I would be interested in some stuff.


69 GTX 68 Road Runner
Re: RacePak EGT's Q's [Re: JERICOGTX] #3065276
08/04/22 06:06 PM
08/04/22 06:06 PM
Joined: Dec 2012
Posts: 1,811
Wind Gap,Pa.
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Sammy Offline
top fuel
Sammy  Offline
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Joined: Dec 2012
Posts: 1,811
Wind Gap,Pa.
I researched this a lot before I purchased my 8 O2 sensors. 2 AF/4 Controllers.
I was told by numerous engine builders who had dynos and all said don't waste your money on EGTs.

Re: RacePak EGT's Q's [Re: JERICOGTX] #3065285
08/04/22 07:02 PM
08/04/22 07:02 PM
Joined: Jan 2003
Posts: 18,593
Las Vegas
Al_Alguire Offline
I Live Here
Al_Alguire  Offline
I Live Here

Joined: Jan 2003
Posts: 18,593
Las Vegas
Originally Posted by JERICOGTX
When you jump ship Al, keep me in mind. I would be interested in some stuff.


Will do. Have three cars full of racepak stuff so it is going tobe an expensive venture. Especially since we just rewired two of them....Ugh no one ever said I was smart or liked money though


"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"
Re: RacePak EGT's Q's [Re: Tig] #3065311
08/04/22 08:49 PM
08/04/22 08:49 PM
Joined: Jan 2004
Posts: 3,986
Motor City
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6PKRTSE Offline
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6PKRTSE  Offline
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Joined: Jan 2004
Posts: 3,986
Motor City
Originally Posted by Tig
Originally Posted by Al_Alguire
I prefer the O2 method but it is fair bit more expensive for sure than EGT's, not that either is "cheap" The fuel we use also seems easier to deal with using O2's than EGT's. Although if it gets to rich it can sometimes read lean on the sensor..Oh the joy of racecar tuning.


I hear ya, all part of the fun, I've been watching you tube where they picked up 60 hp by staggering the jetting as below....but they were using O2 sensors rather than EGT sensors, there was a surprisingly big swing in the jetting !! (We got our tent T/R in 2014 BTW if that's any help grin ).
https://www.youtube.com/watch?v=EP1Rh829rVk&t=1291s

Originally Posted by 6PKRTSE
I have all 8 Racepak EGT and both Racepak O2's on my car. Yes, it gets costly..... Zoom in. I have all engine mounted sensors on my snout bars.


Neat, I can see a row of V-net Tees smile but cant find the EGT amp boxes blush Snout bars are on the other side on the inner fender on mine up We used a USM for our engine monitoring but I'm looking at more (as ya do grin )


The EGT boxes are down lower by the frame rails. There are 8 V Nets on one snout bar and 9 V Nets on the other snout bar hidden down under the master cylinder. 6 more V Nets are mounted in side up under the dash. Monitoring 23 systems altogether. Not sure why I needed all of this on a street car. Lol.


1963 Belvedere 440 Max Wedge Tribute
1970 Charger R/T S.E. 440 Six Pack
1970 Challenger R/T, 528 Hemi
1970 Charger 500 S.E. 440 4 BBL
1970 Plymouth Road Runner 383
1974 Chrysler New Yorker 440
1996 2500 RAM 488 V-10 4X4
2004 3500 Dually Cummins 4x4
2012 Challenger R/T Classic.
Re: RacePak EGT's Q's [Re: Tig] #3065441
08/05/22 11:04 AM
08/05/22 11:04 AM
Joined: Jul 2004
Posts: 19,301
State of confusion
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Thumperdart Offline
I Live Here
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Joined: Jul 2004
Posts: 19,301
State of confusion
A friend of mine has an old Pro Stock Pontiac w/a Nitrous Fulton 648 BB Chevy with 2 cast 1150's which I actually made slightly smaller by skirting down the banjos and before I went through em the afr's were all over the place like 3-4 numbers different from leanest to richest. He went a 1.06 60 ft 4.36 1/8 at 167 mph with it like that then after stagger jetting and bleed changes the afr's were within1-1/2 on all 8 cylinders and he went a 1.01 60 ft 4.30 1/8 at 170 mph so not exactly sure on the actual hp power gains but even distribution is the key to good clean power......


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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