[Project] Help Big Jon pick a Carb :D

[Phantom409]

I'm posting this for BigJon so he can get some input on the proper size carb for his setup so he can keep his build tread clean

All input from here will be taken into consideration
99% street driven car!

His setup is:
383 Stroker
Flat top Pistons
I-Beam Rods
TrickFlow Heads 195's, 64cc Chamber 2.02/1.6 Valves
1.6 Rockers, Full Roller
Comp Cams XE284H RPM range 2300 to 6500.
240/246 Duration @ .050 .507/510 Lift w/ 110 LSA
Intake is a Torqer RPM from Eddelbrock

Thanks guys

[Darren]

Sean's carb

[kammi10]

kyle i already told you guys i had pretty much the same set up in my car and had my carb BUILT FOR MY SETUP.. which means it should just take a tad of tweaking to get it perfect

[bigjon88]

I m the one who ask Kyle to post this since I can't get on a pc I know ur carb is a great one Sean but I wanna make sure cuz I have a 800cfm carb also but I been told it's to big

[kammi10]

800 cfm is not to big for a 383... if it was then why would a company that custom builds carbs for tons of people tell me otherwise and sell me it if it costed no more to keep it a 750..

[bigjon88]

And this is why I have this thread to see what people are going to say before I buy ur carb or any carb at all

[prorac1]

If it were a daily driver I would go with a 750. If your going for all out performance than go with the 850. It may be a smiget to big, but it wont cause any problems. Seans carb would be perfect for this application. How much does he want for it? Eric L

[bigjon88]

450 ish

[bri2203]

Most people know this in reguard to CARBURATORS! "bigger isn't always better!"
Several time at work the customer would complain about performance, put on a small carb and the car comes to life!

I am still learning about carburators and tuning myself, so I would call eldbrock, holley, etc and see what they suggest.
I think my Q-jet is 750. I need to rebuild in the next few weeks.

[Phantom409]

Sean, not trying to up set you bud
Jon just doing his home work and wants to make sure that he is spending his money in the best way possible.

[93formulalt1]

I would go with either a 750 or 800. The 800 Sean is selling would probably be a pretty good choice. What kind is it?

[Boost Addict]

Find a Q jet off a boat off if you're just going to be playing around town with it.

[81DaytonaPaceCar]

Most people know this in reguard to CARBURATORS! "bigger isn't always better!"
Several time at work the customer would complain about performance, put on a small carb and the car comes to life!

I am still learning about carburators and tuning myself, so I would call eldbrock, holley, etc and see what they suggest.
I think my Q-jet is 750. I need to rebuild in the next few weeks.

YES!

EXACTLY!

THANK YOU!

For example, a low HP late 60s 427 only "needs" 500 cfm...depends on what your application and expectations are.

A 750 should be plenty...I've got an over-jetted Holley 750 that ran great when pulled off 4 years ago that I'll let you have cheap...PM me if interested.

[bigjon88]

My only concern(after some thought) with Seans carb is it has mechanical secondaries(meaning, when you floor it the secondaries open immediately) they do not open by vacuum.. If it were a 1/4 mile car mechanical makes more sense, but for street purposes and cruising, maybe not so much. I have a 750 w/mechanical secondaries on a BBC years ago and it was too much fuel when I would hit the throttle. Just my $.02 Good luck man!

some one pmed this to me and wanted me to post it in my thread to add to this little war games going on ...

[bri2203]

My only concern(after some thought) with Seans carb is it has mechanical secondaries(meaning, when you floor it the secondaries open immediately) they do not open by vacuum.. If it were a 1/4 mile car mechanical makes more sense, but for street purposes and cruising, maybe not so much. I have a 750 w/mechanical secondaries on a BBC years ago and it was too much fuel when I would hit the throttle. Just my $.02 Good luck man!

some one pmed this to me and wanted me to post it in my thread to add to this little war games going on ...

Here is an article about carbs and there is a section about mechanical vs vacuum secondaries.
http://www.carcraft.com/techarticles...arb/index.html

Chevelle forum Mechanical vs Vacuum.
http://www.chevelles.com/forums/show...um+secondaries


Sounds like most people would recomend vacuum secondaries for your application.