PM sent

Hurst

 

Its not so much the 5 mm difference as it would be the immediate air flow difference between the 2 sizes. On my 4.6 I had a BBK 75mm TB going into a stock upper plenum. Stock plenum is about 72mm. Doesnt seem like much,.. but I hand ported the stock upper and port matched it to the TB then blended it so the air flow didnt hit any hard edges going down. Picked up 8hp on the dyno from the hand porting alone. So there is hp to be found.

You can use a cordless drill or a dremel. Lows and Home Depot both sell bits to do it. I found that the stone bits dont work so well on aluminum. They become clogged and covered in aluminum shreds. The sanding wheels and roller bits with like 180 grit work best to take out large material,.. then move to 400 grit and then a polishing bit to finish up.

Dont have any picks of my plenum finished,.. but here are some of my heads that I did.






Doesnt seem like much. But I made 272 RWHP and 295 trq on a 4.6 with mild hand ported heads and bolt ons. Its really easy to do. I just took the gasket, used a sharpie to show me how much material I had to play with to match the gasket. And Viola. Took me 3 days to do both heads, intake and exhaust ports.


Hurst

 

Ill trade you a 750 proform dp carb for the intake.

 

Thats tempting. Though I'd rather just have a 4150 HP carb. I've heard mixed stories about the proform bodies. Mainly idle issues and dead spots when nailing it. I dont want to spend alot of time tweaking the carb. The motor is only a 306. So 750 by itself is a little over kill. But I have future plans to build a stroker and dont want to have to buy another carb.

What jets are in it? Could you include a kit with it?

Hurst

 

I think this is a great carb! The jets are 74 main and 80 secondary. I don't think it needs a rebuild but I could get a rebuild kit for it and I have some smaller and bigger jets I could include with it.

 

I've had bad luck with buying used carbs,.. thats why I'm trying to be cautious about this. Looks like a lot of money in that carb. Billet plate, proform body, billet metering blocks and standard Holley bowls. Easily a $1000 carb. My question is if its so good.. why trade for a $500 intake? Whats wrong with it?

From the pics it looks like it was slapped together and passed around a few times. Doesnt always mean there is anything wrong with it,.. but then I really dont know you. I would like to think everyone is a stand up guy and honest.

I dont want to commit to a trade unless I am sure there is nothing wrong with your carb. The intake I have is in beautiful condition. I'll stand behind it 100% as with anything else I sell. If you came back and said this intake wont work for your application,.. I would take it back even if it meant taking a loss. Would you be willing to do the same? If I come back 2 weeks later and say this carb has some major issues,.. will you take it back?

If we do the trade I would definitely want some jets included with it. (I'm thinking thats too much carb for my little motor). The 4150 HP carb I was going to buy after I sold the intake came with a jet kit. Dont need a rebuild kit,.. they arent that expensive. I would be willing to buy that. Does it use standard Holley jets? That carb will flow what,.. 825 cfm with the Proform body?

Hurst

 

Its a Proform carb from proform and they go for about 550 new and its just like a holley.100% GOOD NOTHING WRONG with it and I will stand behind 100% if carb dosent work bring it back! But I don't want to trade if you think its not going to work with your app. I do think its to much carb for a 306 unless you have a radical 306 and it WILL be to much carb! This is a bad ass carb not some pice of junk carb just put together and if you don't want it its cool. I don't really dont want to give it up but and that is the intake I was going to buy. I wanted the intake to go fuel injected because I just picked up a vortech v-1 supercharger and won't beable to use the carb with it on my 347.

Give my a call if you want to know more about it 813-789-9686. Dave

 

passed around alot? that carb was only on 1 car befor and it was tooo small. it was on my big block on the dyno and worked great.

 

Stop it!!!!

 

I think its a little bit too much carb for my little 306. That and my previous bad luck with used carbs has left me weary of ever buying another used one,.. especially with this much money involved for it.

I'm going to pass. I'd rather have cash.

Hurst