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carb jetting #308109 05/04/09 10:24 PM 05/04/09 10:24 PM
Joined: Jan 2009 Posts: 46 harmony pa rampage08 OP member
rampage08 OP member Joined: Jan 2009 Posts: 46 harmony pa	just installed a new cam and now dont seem to be gettin enough fuel. the cam is .564 lift and 295 intake 307 exhaust duration. was told should step up jets in carb. i'm runnin a 750 double pump barry grant holly. any suggestions??????????????? 5208392-GetAttachment3.jpg (110 downloads)

Re: carb jetting [Re: rampage08] #308110 05/05/09 09:55 AM 05/05/09 09:55 AM
Joined: Jan 2003 Posts: 4,002 Joplin, Mo R rt66jim master
rt66jim master R Joined: Jan 2003 Posts: 4,002 Joplin, Mo	How many CI's? I wouldn't expect to have to go up more than 4 sizes in the frt and rear. If the carb is right probably not more than 2 sizes. If the cam is alot bigger than the old one. You may need to try a 4 hole spacer under the carb to get a better signal to it. Jim [IMG]http://i34.photobucket.com/albums/d104/rt66jim/scan0001_zpso6tfgkqx.jpg[/IMG]

Re: carb jetting [Re: rampage08] #308111 05/05/09 10:12 AM 05/05/09 10:12 AM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	need more info, what engine? what was in there before? what is the current jetting..cool truck, where's the bed? loose it on a jump? [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: carb jetting [Re: Mr.Yuck] #308112 05/05/09 10:44 AM 05/05/09 10:44 AM
Joined: Jan 2009 Posts: 46 harmony pa rampage08 OP member
rampage08 OP member Joined: Jan 2009 Posts: 46 harmony pa	is a 360 la. board to 410 c.i. got ported and polished edelbrock heads with 208 and 165 valves. carb is a barry grant holly 750 double pump. front is jeted at 76 and rear is at 83. my old cam was 248 duration and 484 lift and it ran perfect. couldnt find a decent short bed so i made the flat bed out of 3/16 aluminum diamond plat with 2x2 treated wood to keep weight down. bed only weighs 42 pounds

Re: carb jetting [Re: rampage08] #308113 05/05/09 10:49 AM 05/05/09 10:49 AM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Try jumping up by 2's and see what happends. That is a lightweight bed.

Re: carb jetting [Re: Mr.Yuck] #308114 05/05/09 10:53 AM 05/05/09 10:53 AM
Joined: Jan 2009 Posts: 46 harmony pa rampage08 OP member
rampage08 OP member Joined: Jan 2009 Posts: 46 harmony pa	thank you. just got off phone with summit tech and they said same thing. gonna give it a try.....will post results .......thanks alot 5209240-GetAttachment10.jpg (60 downloads)

Re: carb jetting [Re: rampage08] #308115 05/05/09 12:51 PM 05/05/09 12:51 PM
Joined: Mar 2004 Posts: 127 Dahlonega, GA T TechAtBG member
TechAtBG member T Joined: Mar 2004 Posts: 127 Dahlonega, GA	Quote: just installed a new cam and now dont seem to be gettin enough fuel. the cam is .564 lift and 295 intake 307 exhaust duration. was told should step up jets in carb. i'm runnin a 750 double pump barry grant holly. any suggestions??????????????? As stated jet up the front and the rear 2 numbers at a time and as long as the motor continues to respond you can add jet. Last edited by TechAtBG; 05/05/09 12:52 PM.

Re: carb jetting [Re: TechAtBG] #308116 05/11/09 09:19 PM 05/11/09 09:19 PM
Joined: Jan 2009 Posts: 46 harmony pa rampage08 OP member
rampage08 OP member Joined: Jan 2009 Posts: 46 harmony pa	man did that ever work.............. ran a 200 foot long and 3 foot deep pit yesterday in 6.35 seconds.....what a rush 5223246-GetAttachment3.jpg (50 downloads)

Re: carb jetting [Re: rampage08] #308117 05/11/09 09:21 PM 05/11/09 09:21 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: man did that ever work how many sizes up did you go live every 24 hour block of time like it's your last day on earth

Re: carb jetting [Re: RapidRobert] #308118 05/11/09 09:22 PM 05/11/09 09:22 PM
Joined: Jan 2009 Posts: 46 harmony pa rampage08 OP member
rampage08 OP member Joined: Jan 2009 Posts: 46 harmony pa	4 sizes front and rear

Re: carb jetting [Re: rampage08] #308119 05/11/09 09:38 PM 05/11/09 09:38 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	the only eng change was a different cam & 4 numbers up(per side)got it back perfect live every 24 hour block of time like it's your last day on earth

Re: carb jetting [Re: rampage08] #308120 05/12/09 09:51 AM 05/12/09 09:51 AM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: man did that ever work.............. ran a 200 foot long and 3 foot deep pit yesterday in 6.35 seconds.....what a rush glad it helpped.

Re: carb jetting [Re: RapidRobert] #308121 05/12/09 08:20 PM 05/12/09 08:20 PM
Joined: Jan 2009 Posts: 46 harmony pa rampage08 OP member
rampage08 OP member Joined: Jan 2009 Posts: 46 harmony pa	not just cam. changed heads and rockers to

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