1966Oldsmobile

Hi!
I read almost all threads but did not find the right answer for my issue!
What intake manifold and carburator fits best on my ´66 330 holiday coupe and has the best performance?

What do I have to change when build in a new manifold and a carburator, or is it plug and play!

Sorry because of my english, I´m not a native speaker.

Thank you very much!

oldcutlass

What carburetor is on it right now? Is the motor stock?

1966Oldsmobile

Yes Motor is stock! It´s the 330 with 250HP

joe_padavano

Unfortunately, "best performance" is a very subjective term. Are you looking for lowest quarter mile times, best gas mileage, overall street driveability? The selection will be different depending on your answer. Also, what else, if anything have you or do you plan to do to the motor? Dual exhaust? Cam? What about trans and gears.

An engine is a system and all parts need to be matched to the intended purpose for best performance.

1966Oldsmobile

I´m looking for street driveability and i´m looking for about 350HP. Yes to dual exhaust and I have the shitty 2 gear transmission (will change to 4 gear automatic transmission).
And the motor will be reworked before (original). Is now a answer possible?? i hope so.

thanks a lot

joe_padavano

Yup. I'm assuming this is in a Cutlass. I'd use an Edelbrock Performer RPM (P/N 7111) and a properly set up Quadrajet carb. A 600 CFM E-brock carb would work also, but I think there are some linkage clearance issues that require a spacer.

http://www.summitracing.com/parts/edl-7111/overview/

oldcutlass

X2 on this, I don't think there are any linkage issues with the Edelbrock carb though.

olds 307 and 403

He will already have a Qjet, but it will need an overhaul and jet change. A RPM intake as suggested plus the new Street Demon carburetor. This carb is based off the Carter Thermoquad. You can get complete tuning kits and secondary air door adjusts with a screw driver. The Thermoquad needed a special tool. You can get either a polymer or aluminum main body, optional tps for use with trans like the 4L60E. It is 625 cfm and fits square and spread bore manifolds.

joe_padavano

Yeah, with a divorced choke that won't work on the RPM intake.

olds 307 and 403

Good point, forgot about the divorced choke. Even more reason to go with the Street Demon.