Re: ubly results
[Re: mopar dave]
#745352
07/11/10 10:36 AM
07/11/10 10:36 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
off the trailer car went 2 tenths and 2 mph slower. changed carb spacer to a 1" open from a 4 hole tappered and picked up .5 mph in 1/4 but lost .5 in the 1/8 with same et. changed jetting to 87/96 from 86/94 ran almost identicle et/mph. carb seems insensitive to jet changes,so i put 90/98 jets in and lost 2 mph and one tenth,but put some color on plug,grey. plugs have been white up to this point. ran into EDDIEB there,great guy. he suggested smaller high speed air bleeds,i agree. fuel pressure thru the traps was 7psi. any ideas?
Well you know you can slow the car down by adding jet so you have enough supply... jet back down to find the fastest MPH... MPH is the hp... ET is chassis once you find the fastest MPH then start doing the spacer chances and then you need to start all over again to find the fastest MPH... you need to optimize each combo... just to change the spacer and say that didnt work without optimizing wouldnt be correct... JMO
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Re: ubly results
[Re: mopar dave]
#745353
07/11/10 10:37 AM
07/11/10 10:37 AM
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Joined: Aug 2008
Posts: 941 Texas, USA
ChrgrCuda
super stock
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super stock
Joined: Aug 2008
Posts: 941
Texas, USA
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I lost 5 mph and 3 tenths last time out, 68 notch, small block stroker. I square jetted and removed PV, but didn't jet up. Just a thought.
68 Cuda Notchback [Email]10.86@120[/Email]
69 Charger R/T 440/505
2009 Challenger SRT8
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Re: ubly results
[Re: Ian]
#745355
07/11/10 03:41 PM
07/11/10 03:41 PM
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Joined: Jan 2007
Posts: 8,042 Mt Morris Michigan
mopar dave
OP
master
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OP
master
Joined: Jan 2007
Posts: 8,042
Mt Morris Michigan
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the spacer change alone was worth .5 mph gain without any jetting. i added jet after that and lost just a smidgen of mph til i went up 4 sizes front and back and lost about 2 mph,but the plug was still light grey in color after getting back to the pit. Ian, the best 1/8 was a 6.88@99.50 mph. why would the plugs be so light in color with so much jet in a 1000hp (90/98)?
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Re: ubly results
[Re: mopar dave]
#745365
07/12/10 01:12 PM
07/12/10 01:12 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
yes,we were runnin 1/4 mile tnt and grudge. 1/8 racing is on sunday.
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Re: ubly results
[Re: mopar dave]
#745369
07/12/10 03:34 PM
07/12/10 03:34 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
do you think the scoop needs to be sealed to the carb?
That would help
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