JP007

iTrader: (3)

L98 350 XR270 comp cam. 5 speed. 3.23 gear.

Holley 6210 Spread Bore 650 CFM mech secondaries
Or
Jet 35002 750 cfm Stage 2 Q-Jet Carburetor

I think either are pretty good choice and I can work on either but comments would be helpful.

JP

five7kid

iTrader: (14)

With a T5, you're a little better off with the mechanical secondaries. But, the 6210 is divorced choke, and the factory put q-jets on T5 cars, so I'd say pick your poison.

JP007

iTrader: (3)

Thanks you were who I hoped would voice this one. Pretty much a horse a piece. For this a daily driver like you say pick your poison. Either will fit under the dual snorkel. 6 3rd gens and figured this one will be walk before you run car. I want to do 1 carb, 1 TBI and the 1 TPI modified. Mans got to have a goal.
JP

sofakingdom

iTrader: (1)

I would pick the 6210... IMO the Q-Jet could ultimately be the better carb, but the 6210 is FAR easier to tune. Given the limited - and shrinking - availability of Q-Jet tuning parts, I think their days are pretty much over.

The divorced choke can be super easy to work with, depending on what intake you use.

Seafarer12

For DD's I always liked AFB style carbs the best. No gaskets below the fuel level, less messing with that any Holley I ever owned. Q-jets arent bad on a stock engine but they are all getting old now and they wear out and either leak fuel or vacuum. If you have to stick to the ones listed it is a craps shoot in my mind. If you threw in a 625 cfm Edelbrock I would vote for that.

ZZ3 Z28

Not to hijack the thread but since you raised the q about Q-jets seeeing thier days numbered, then what is an acceptable replacement for CC (ecm) equipped cars? It's been a few years since I've looked into this and I never really found a good replacement without some one telling me the ecm would have to be tossed out. This is one of the things I plan on investigating at the upcoming Racing Expo in St. Charles, IL. I've looked at FAST products and MSD Atomic EFI but don't have 2 G's in my pocket.

sofakingdom

iTrader: (1)

There aren't really any... if you have to keep the computer control, the Q-Jet is all there is.

JP007

iTrader: (3)

Bought a Holley 6210 Spread Bore off Ebay - Rebuilt from a known good firm as customer didn't pay the bill and got it for $99.50. So on my way with this one.

sofakingdom

iTrader: (1)

Cool.

Read the Holley Tuning sticky at the top of the Carb forum. The technique it describes fits that carb perfectly.

rusty vango

exactly ,holleys REQUIRE constant fiddling. yes they make more power than a AFB.but if you would rather drive the car instead of tuning a holley.....again, they are the only choice IMHO. carter AFBs are a "set it and forget it" carb.holleys are not

lectric80

iTrader: (1)

I won't make a recomendation as to which you should go with, but Jet puts out high quality Q-jets. I have had them work on several and never had to do more than adjust idle out of the box. As for Holley and Edelbrock I can't say the same about their carbs. Yes the q-jet is getting old, but it is still a very high quality carb that just plain works, and Jet knows how to ensure they are set up properly.

five7kid

iTrader: (14)

I really don't understand where stuff like this comes from. I would run my Holley at the track from April to October, and the only time I would "fiddle" with it was in September when I'd go from 5800' elevation to 1100' elevation - which would be a jet change and idle adjustment. Reversed when I went back home to 5800' elevation, then leave it alone until the next September.

sofakingdom

iTrader: (1)

^^^^^^

At one time, they were the stock carb on MILLIONS of cars and trucks on the road.

Actually, I think I do have somewhat of an idea... a combination of over-tightened fuel bowl screws, ruptured power valves from backfires, poor calibration in out-of-the-box "performance" ones, dissimilar-metal corrosion in the screw holes, the "typical" hot-rodder's usage schedule consisting of months of sitting idle followed by jump in on the first pretty Saturday afternoon, maybe a couple of other ingredients...

Irockz

iTrader: (1)

NO NO NO,you guys don't understand.Carb gnomes,they are anti-Holley.You see,they don't have tools that will fit any other carb,only Holleys.Thats why the AFB style never gets messed with,the carb gnomes travel at night,from one garage to another.They only attack the Holleys,that's why they don't "hold a tune".
On a serious note,if you say that a Holley won't hold a tune,it's because YOU DON'T KNOW HOW TO TUNE A CARB.