Outer Limits 4x4 Board

Hi.

Looking to fit one of these carbies to my GQ 350 Chev.
Who sells them and how much.
Which size for mild 350???

Cheers

Grant.

any performance shop will sell them. i went to the holley distributor here in perth.

had a 470cfm on my 253 and i thought it was too big. that was the smallest they go in the truck avenger. maybe try between a 500 and 600cfm on the chev?

Unless it's a killer motor, a well set up 600 will be fine. Most motors that are back yard carbed are way big for street/off road.

Hume Performance know their Holley stuff
Avengers come in 570, 670 & 770 CMF

http://www.hume.com.au/index.php?cPath=21_49_53

Send a PM to geothro on here. I know he recently purchased a brand new truck avenger and didn't end up needing it so is selling it cheaper than the price he paid for it new.

Cheers
Simo

Mate of mine had one on his Jeep and wasn't a fan. Can PM you his detail Grant if you want.

Quadrajet always worked on my Chevs with a few mods.

TBI Injection is cheap also.

A 350 Chev that revs to 6000rpm only realy needs a 516cfm carb. therefore the 570 jetted up would fit the bill.

Assuming the volumetric efficiency of the engine is 85% which is realy good in a petrol. VE = 0.85
Carb CFM = VE (Engine CID x max RPM / 2456)

i'll post up a price tomorrow. we sell them at work and will ship anywhere in OZ.

brad-chevlux wrote:i'll post up a price tomorrow. we sell them at work and will ship anywhere in OZ.

Cheers for that.

I put the 470 on my 305 chev. Its got a 60 thou overbore, mild cam, street rockers, decent intake and goes like the clap. Cost me 650 new. I love it. The electric choke is a ripper. I work overseas and I can come home after a couple of months, few pumps on the throttle, turn the key and away she goes.. Ive had it at some great angles offroad and never coughed or spluttered once.

Brad, can you give me a price on a 770cfm as well please. Cheers, Beretta

beretta wrote:Brad, can you give me a price on a 770cfm as well please. Cheers, Beretta

no worries, post up on monday

brad-chevlux wrote:

beretta wrote:Brad, can you give me a price on a 770cfm as well please. Cheers, Beretta

no worries, post up on monday

Any luck with prices yet??

GUEEY wrote:

brad-chevlux wrote:

beretta wrote:Brad, can you give me a price on a 770cfm as well please. Cheers, Beretta

no worries, post up on monday

Any luck with prices yet??

570 $575
670 $590
770 $630

all prices include GST and delivery

i'm recommending the 570 for the 350cui engine.

I'd use the 470 on a 5L

I've fitted a few with good sucess but don't expect the tune to be right out of the box despite what holley or your seller may say.

Joel

brad-chevlux wrote:

GUEEY wrote:

brad-chevlux wrote:

beretta wrote:Brad, can you give me a price on a 770cfm as well please. Cheers, Beretta

no worries, post up on monday

Any luck with prices yet??

570 $575
670 $590
770 $630

all prices include GST and delivery

i'm recommending the 570 for the 350cui engine.

I'd use the 470 on a 5L

Thanks for the pricing.
Is the 570 big enough for the 350?
Is there room to upsize jets if it is not upto feeding it.
I thought i read on the holley site someware that they recomended the 670 for V8s upto 400 HPand the smaller size for 6 cyilnder?
I no nothing, just want to get it right the first time.

Thanks

Grant

PGS 4WD wrote:I've fitted a few with good sucess but don't expect the tune to be right out of the box despite what holley or your seller may say.
Joel

i've only ever seen a hand full of holleys that didn't need touching.
had a 570 street avenger i put on a 347 windsor the other day that turned out to be a bolt job, though i still check every carb install with a exhaust gas analyzer.

GUEEY wrote:

brad-chevlux wrote:

GUEEY wrote:

brad-chevlux wrote:

beretta wrote:Brad, can you give me a price on a 770cfm as well please. Cheers, Beretta

no worries, post up on monday

Any luck with prices yet??

570 $575
670 $590
770 $630

all prices include GST and delivery

i'm recommending the 570 for the 350cui engine.

I'd use the 470 on a 5L

Thanks for the pricing.
Is the 570 big enough for the 350?
Is there room to upsize jets if it is not upto feeding it.
I thought i read on the holley site someware that they recomended the 670 for V8s upto 400 HPand the smaller size for 6 cyilnder?
I no nothing, just want to get it right the first time.

Thanks

Grant

the 570 is plenty for what i class as a mild 350. What exactly is your engine combo?
There is always room for jetting changes, but i don't recommend it be done without good quality A/F meter.

brad-chevlux wrote:

PGS 4WD wrote:I've fitted a few with good sucess but don't expect the tune to be right out of the box despite what holley or your seller may say.
Joel

i've only ever seen a hand full of holleys that didn't need touching.
had a 570 street avenger i put on a 347 windsor the other day that turned out to be a bolt job, though i still check every carb install with a exhaust gas analyzer.

GUEEY wrote:

brad-chevlux wrote:

GUEEY wrote:

brad-chevlux wrote: no worries, post up on monday

Any luck with prices yet??

570 $575
670 $590
770 $630

all prices include GST and delivery

i'm recommending the 570 for the 350cui engine.

I'd use the 470 on a 5L

Thanks for the pricing.
Is the 570 big enough for the 350?
Is there room to upsize jets if it is not upto feeding it.
I thought i read on the holley site someware that they recomended the 670 for V8s upto 400 HPand the smaller size for 6 cyilnder?
I no nothing, just want to get it right the first time.

Thanks

Grant

the 570 is plenty for what i class as a mild 350. What exactly is your engine combo?
There is always room for jetting changes, but i don't recommend it be done without good quality A/F meter.

Not sure on the internal, but it is a 350 4 bolt, drop forged pitons, i checked the block id tonight and it surgests ex Corvette 370hp 3970010 and it goes like stink

You'll get a lot of opinions about what carb to use.
I really don't like over carbing an engine, It leads to poor drive ability at lower rpm, it can also make it hard to get the accel pump adjusted right.


If it was in weekend strip car i'd be leaning for the bigger carb, but then you wouldn't asking about a truck avenger and i'd by talking to you about the Street HP range.

in a 4by, where you will need good low speed low rpm control the smaller carb will be better. Though it will loose out a little on peak power.

brad-chevlux wrote:You'll get a lot of opinions about what carb to use.
I really don't like over carbing an engine, It leads to poor drive ability at lower rpm, it can also make it hard to get the accel pump adjusted right.


If it was in weekend strip car i'd be leaning for the bigger carb, but then you wouldn't asking about a truck avenger and i'd by talking to you about the Street HP range.

in a 4by, where you will need good low speed low rpm control the smaller carb will be better. Though it will loose out a little on peak power.

I am sure your recomendation would be a nice improvement from the impco 300A gas mixer that is feeding it at the momment.

Thanks for you advise, will be intouch very soon to place a order.

Grant.

GUEEY wrote:

brad-chevlux wrote:You'll get a lot of opinions about what carb to use.
I really don't like over carbing an engine, It leads to poor drive ability at lower rpm, it can also make it hard to get the accel pump adjusted right.


If it was in weekend strip car i'd be leaning for the bigger carb, but then you wouldn't asking about a truck avenger and i'd by talking to you about the Street HP range.

in a 4by, where you will need good low speed low rpm control the smaller carb will be better. Though it will loose out a little on peak power.

I am sure your recomendation would be a nice improvement from the impco 300A gas mixer that is feeding it at the momment.

Thanks for you advise, will be intouch very soon to place a order.

Grant.

no problem, just PM me when you're ready.

Petersen's tested one of these years ago when they came out and didn't rate it very highly. Apparently the quadrajet was a better offroad carby.

I don't have anything else to add.

Steve.

LOCKEE wrote:Mate of mine had one on his Jeep and wasn't a fan. Can PM you his detail Grant if you want.

Quadrajet always worked on my Chevs with a few mods.

TBI Injection is cheap also.

Probelm with "mates" is you don't always know exactly what the setup was
VERY few people that I;ve talked to have any issues with the Truck avenger in offroad use.
Maybe your mate had the Street Avenger - which is well known to suck offroad.
What manifold was he running? etc.
Also people above are talking about a 570 - There no such beast - they are 470, 670 & 770.

I am currently preparing to drop a 360 into one of my jeeps and all my research has lead me to the 470 Truck avenger with the Edelbrock AirGap manifold.
IMHO the 670 is too much carby for a stock/mild engine used offroad and again incorrect application could be why Lockees mate wasn't happy with it....

Wooders wrote:

LOCKEE wrote:Mate of mine had one on his Jeep and wasn't a fan. Can PM you his detail Grant if you want.

Quadrajet always worked on my Chevs with a few mods.

TBI Injection is cheap also.

Probelm with "mates" is you don't always know exactly what the setup was
VERY few people that I;ve talked to have any issues with the Truck avenger in offroad use.
Maybe your mate had the Street Avenger - which is well known to suck offroad.
What manifold was he running? etc.
Also people above are talking about a 570 - There no such beast - they are 470, 670 & 770.

I am currently preparing to drop a 360 into one of my jeeps and all my research has lead me to the 470 Truck avenger with the Edelbrock AirGap manifold.
IMHO the 670 is too much carby for a stock/mild engine used offroad and again incorrect application could be why Lockees mate wasn't happy with it....

Your right. Looks like i was given a list of carbs that included the 570 street avenger in with the truck prices.

I wouldn't be using a 670 on a 350cui engine in a 4by.

brad-chevlux wrote:

Wooders wrote:

LOCKEE wrote:Mate of mine had one on his Jeep and wasn't a fan. Can PM you his detail Grant if you want.

Quadrajet always worked on my Chevs with a few mods.

TBI Injection is cheap also.

Probelm with "mates" is you don't always know exactly what the setup was
VERY few people that I;ve talked to have any issues with the Truck avenger in offroad use.
Maybe your mate had the Street Avenger - which is well known to suck offroad.
What manifold was he running? etc.
Also people above are talking about a 570 - There no such beast - they are 470, 670 & 770.

I am currently preparing to drop a 360 into one of my jeeps and all my research has lead me to the 470 Truck avenger with the Edelbrock AirGap manifold.
IMHO the 670 is too much carby for a stock/mild engine used offroad and again incorrect application could be why Lockees mate wasn't happy with it....

Your right. Looks like i was given a list of carbs that included the 570 street avenger in with the truck prices.

I wouldn't be using a 670 on a 350cui engine in a 4by.

That now makes sense from what i was previously recommended.

Grant

Holley use the formula CID x Max RPM / 4356
350 x 6000 / 3456 = 607 cfm
Its accurate enough, for offroad use a little smaller to optimize air speed at low RPM rather than looking for peak top end power figures that could be acheived with a larger carby.

Joel

PGS 4WD wrote:Holley use the formula CID x Max RPM / 4356
350 x 6000 / 3456 = 607 cfm
Its accurate enough, for offroad use a little smaller to optimize air speed at low RPM rather than looking for peak top end power figures that could be acheived with a larger carby.

Joel

Looks like your about as dyslecic as me. Always knew it was 3456. My fingers don't.
I like to include a correction for loss between the engine CID & how much air it really takes in.

Fingers made for spanners not keyboards. I agree depending on the effeciency of the engine the figure can be as much as 20% less.

Joel

Wat a load of shit have never heard so much crap till i finally got on this crappy sight. Holley carbs are crap truck avenger wow spring loaded needles, flood tube, side hung floats the yanks tried all this in the 70s did not work. Good way to set your car on fire put hollet carb on it. Wow i saw a GQ with a lift kit.

jeepspeed74 wrote:Wat a load of shit have never heard so much crap till i finally got on this crappy sight. Holley carbs are crap truck avenger wow spring loaded needles, flood tube, side hung floats the yanks tried all this in the 70s did not work. Good way to set your car on fire put hollet carb on it. Wow i saw a GQ with a lift kit.

Well that was a constructive addition to this tread that was started by myself to give me some helpful advise on an offroad carby.
Are you actually offering any advise or just pissing into the wind.