holley carb and edelbrock intake

[305chevy c-10]

hey i have a 600-650 holley  carb and a edelbrock performer intake .im putting this on a stock 1985 c10 w/t 305 will this give my engine more torque...or simply just drink more gas .......just trying to get more low end torque from a 305 with out investing alot in such a small motor

[Captkaos]

You won't gain anything noticeable as far as power in my opinion.  If you want more power you need to do a cam swap along with the associated pieces to make more power.

[305chevy c-10]

 ...........thanks cap .so much for that ....well what do you suggest for a cam that would be ok with stock converter

[VileZambonie]

Your best bet would be a new rear gear ratio

[Stewart G Griffin]

i'm with VZ on the diff ratio.

Also, i think headers are cheap way to more torque.  i think edlebrock has something that will bolt in, but i'm too tired to look it up.

[malibu795]

a good 1 1/2" tube header will work nicely on a 305

the performer cam that edelbrock sells works nicely as well

[jimbo]

You won't gain anything noticeable as far as power in my opinion.  If you want more power you need to do a cam swap along with the associated pieces to make more power.

I disagree, with a decent exhaust the intake alone should help a bit and the holley is more tunable than the q-jet, I would definitely go for it.  Although an intake swap is a perfect time to swap that dead fish of a cam in that 305 if you are going to do it.

[jimbo]

Here is a good read:
305 BUILD-UP PART 1.

Car Craft started out with an 80,000 mile (130,000km) 305 LG4 engine from a 1982 Camaro. They removed the engine from the Camaro and put it straight on the dyno with headers, 3" dual pipes to Flowmaster mufflers, and a HEI distributor with 22 deg total advance. This gave a baseline dyno result of:

197 HP @ 4,000 rpm. 261 ft/lb torque @ 3,100 rpm.

305 BUILD-UP PART 2.

Added an Edelbrock Performer EGR intake manifold, but with the EGR blocked off.

217 HP @ 4,200 rpm. 285 ft/lb torque @ 3,300 rpm.

This is an increase of 20 HP and 24 ft/lbs over stock.

305 BUILD-UP PART 3.

Replaced Edelbrock Performer EGR intake with an Edelbrock Victor Jr single plane intake manifold. Replaced Q-Jet carb with a 750 Holley double pumper.

217 HP @ 4,200 rpm. 285 ft/lb torque @ 3,300 rpm.

This resulted in no change from the previous mods, maintaining the increase of 20 HP and 24 ft/lbs over stock.

305 BUILD-UP PART 4.

Added Comp Cams XE262H-10 "Xtreme Energy" hydraulic flat tappet cam. 218/224 dur @ 0.050, .462/.469 lift, 110 deg LS. Set initial timing to 16 deg BTDC.

270 HP @ 5,100 rpm. 291 ft/lb torque @ 3,800 rpm.

The cam change resulted in a huge increase of 53 HP. Torque was up by 6 ft/lbs.

305 BUILD-UP PART 5.

Replaced stock cylinder heads with World Products 305 S/R Torquer heads.

298 HP @ 5,500 rpm. 308 ft/lb torque @ 3,900 rpm.

A 28 HP increase over the stock heads, and the 305 engine now has close to 300 HP.

305 BUILD-UP PART 6.

Replaced World Products 305 S/R Torquer heads with '96 - '97 Chevy truck L31 Vortec cast iron heads, GM P/N 12558060. These are available from GM dealers in the USA for US $408 a pair, fully assembled. The Vortec heads require a different intake manifold, and Car Craft chose an Edelbrock Super Victor. They kept the same Holley 750 DP. Car Craft says that these heads are a bolt on for conventional small block Chevy engines. If your engine is earlier than '87, you will also need a set of self aligning rocker arms, and a pair of "center-bolt" valve covers.

325 HP @ 5,800 rpm. 317 ft/lb torque @ 4,800 rpm.

TECH COMMENTS

With peak torque at 4,800 rpm, the 325 HP 305 would definitely need some stiff rear end gears (I'd suggest a minimum of 3.73 ratio) plus a high stall converter if the car had auto trans. In my opinion the WP Torquer heads are the better choice for a street engine. I think that a 300HP 305 with 308 ft/lbs at 3,900 rpm, would be a nice street / strip combination.

[Jim Rockford]

you will never beat a good Qjet for performance and fuel economy.

[malibu795]

you will never beat a good Qjet for performance and fuel economy.

if you can get it tuned properly and keep it tuned..


the performer series and AVS thunder series share alot of similairity with a Q-jet

[jimbo]

you will never beat a good Qjet for performance and fuel economy.

I completely disagree.  I have had some qjets and even a speadbore holley that have done very well, but none of them have ran as well or gotten as much mpg as some of my squarebore holleys.

[VileZambonie]

It's all in how you tune em

[jimbo]

It's all in how you tune em

Agreed.