Heyas, got my Stock 5ltr VL.. rochester has **** itself, wanna bolt up a Holley, cause a) they are easy to find in pretty good condition b) people in this town dont have a clue how to tune a rochy' But, im abit confused as to what size I need.. I believe a 600 - 650 should do it, but would say a 750 be way too much ? What do you guys have on your stock motors ?

i have a 650 in my vl and it goes good..

ive got a 600 vac seconds and it pulls hard also, i have used a 750 and i found it to just be way to rich.

all u need is a 650, its nothing over the top but its good. hope u no what i mean. but a 650 is all u need, it can take a fair bit, and if ur looking to do more mods later down the track u will be fine

pity you don't have access to someone who knows what they're doing with the Quady's as IMO they are a much better option!

this might be a bad idea, but....id buy a carby to suit (what eva it might be u want) then get rochy sent away to someone who knows to get it rebuild then mabie if u ever go to somewere like another town were theres a good bloke 2 do it then get it done Some original photos have not been recovered yet.

Bare in mind when your putting on the holley you are gona loose all your pollution gear that is setup with the standard rochester providing it is setup at the moment as the holley wont have all the conections and valves for this that the standard carb does I have just finished connecting all mine up to take it over the pits

Use the quadrajet. They are almost the same as a 600 holley! I had mine tuned up on a VK motor in my HQ. (Same motor as VL) and stock it made 127 rwkw. I ended up getting more power using less fuel than when i drove in there!

Guess you didnt read my first post. No-one here knows WTF they are doing with a Quaddy unfortunatley Some original photos have not been recovered yet.

Are you guys talking about/sugesting the 600/650 vacs or DP's in place of the Quady?

for not to bad fuel consumption and for driving around town the vac seconds are a better choice as the secondaries will not open unless the throttle is full on etc. but the mechanicle secondaries seem to be the preferred choice for performance engines as the can control the butterflies etc.

You can also jet them differently aswell, I would recommend a 600 Vac Secondary because with a stock 5L, any larger won't do it justice and will probably use more fuel and not achieve much power. If you do some headwork and a bigger cam etc then you would look at 650 DP.

go the holley they piss all over quads there bin material and it easyer to tune change jet but u must use the square bore

go the demon

Quote: Originally Posted by pigsy qld go the holley they piss all over quads there bin material and it easyer to tune change jet but u must use the square bore What? Quaddies are better on fuel due to the smaller primaries, and if you get some who can tune them they work well (and stay legal) Quady can flow 750cfm I believe...... As someone else said, have you thought about borrowing a Holley from someone and getting your quaddy tuned by mail? I hear Autotechnique in Melbourne are meant to be guns with them!

stick with the quady, holden put hours of devolpment into that carb to go with that motor, so there is no reason you couldn't run one with a mid range cam (i ran one with a crane cch304a, but i'm a d**khead) mild ports etc. just search for a good tuner

Yes stick with the Rochester, much better carby Send it away to get rebuilt

Quote: Originally Posted by aus880 Yes stick with the Rochester, much better carby Send it away to get rebuilt i've got fucked quady too. any idea on prices? or a workshop with a good rep, i don't mind sending it interstate but surely there must be somewhere in perth to get a quady rebuilt.

Guys... im pretty sure he doesnt wanna keep the quady...

If he does wanna keep it. (my recomendation is keep it). Try this guy. He has just recently done a quaddy exchange for me for 240 bucks. The best 240 i have spent latley. When I took it to be dynoed the guys couldn't believe how close it was to being spot on. MLP Carburettors P/L 7 Lakeside Ave Reservoir Vic 3073 Australia PH: 03 9462 2288 Fax: 03 9462 1222 [email removed]