[slow90]

Im buying the BBK upper intake and 70mm throttle body outta AM. my question is, should i upgrade the heads before it? will much difference be made there. Not sure about these stock ones. dont know anything about them. Heard it will restrict power buy having the stock ones and will virtually be pointless to do the intake swap if i leave stock heads on....

many thanks. yur local 8 hampster stang

[Chris951]

You're correct. You will gain a little power but heads and intake should both be done because they are both big restrictions on 5.0's. I would save my money if I were you. Or at least get a good intake that will give you room to grow. I have never heard one good think about those bbk intakes.

[ryanw]

Id skip the bbk intake. There are much better intake out there for the same or less money

[horsepowerjunkie]

I'd spend your BBK intake money on a decent set of heads & top it with a mildly ported Explorer/GT40 intake and be way ahead of the game!

[slow90]

also was looking into the tyfoon(sp?) upper. whats the word about some 351w heads ported and polished? seems like EVERYONE has gt40's now a days. but ofcourse there could be a reason behinde that. lol.

[ryanw]

351 heads are nothing. And gt40 are okay but the same money your going to spend on them , you could have saved a few more bucks and bought a used set of trick flow or afr heads

If your going to spend the money, then save a little more and do it right the first time and in the end you'll save money because you didn't have to buy the same parts twice, not to mention labor cost if your not doing it your self

[gripthenboost]

Im i the only one that likes the cobra upper and lower intakes? There supper cheap and flow well.

[ryanw]

Originally Posted by gripthenboost Im i the only one that likes the cobra upper and lower intakes? There supper cheap and flow well.

oh i liked my cobra intake, but every thing else was stock so i never felt any real power from it, but i can tell you that the ports on the cobra compaired to my new trick flow intake is a night and day difference, but ofcourse with out my after market AFR heads my intake would have been pointless

[slow90]

finding descent heads these days on CL and EBAY is nothing but an uphill battle. (used)
if i spend the $500+ on heads alone it wont be at the least 3 months untill i can get the intake. im considering upgrading the TB for now and taking my money to other parts of the vechicle for now. Attepmt to save up the money to buy both; heads and intake, at the same time. good idea? or leave TB alone for now as well?
now that i think about it, i do need a good set of drag radials..... lol

[mustangmaniac95]

go on the corral and you can find some really nice used heads and intake...just buy each piece when you get the money and put it on when you get everything...it would be pointless to put a tb on with stock maf and heads and all, wont gain barely any hp..like ryanw said, do it all right, the first time...its been a month and i almost have all of my parts and bought everything used from corral..might as well upgrade injectors while your at it dude..and get aluminum heads like trickflow and afr, you wont be disappointed..and the cobra intake is a good intake but there are better ones out there for not a lot more money

[slow90]

good lookin out people.

[2sillystangs]

I hope i don't offend anyone especially slow90 by asking this question but it seems like you guys know what your talking about. How much power will a 306 with a b-cam and explorer top end make? The heads just have a bowl job to accommodate the 1.850 int./1.550 ext. valves. Also I'm gonna run a sn95 70mm maf and have full Mac exhaust. That's it!

Thanks guys

[ryanw]

i wouldnt even bother upgrading just the TB...you will see ZIP in the horse power range...the tb is considered a SUPPORTING mod, meaning that if you dont upgrade other things first such as heads and intake, its pointless. the only reason to upgrade a TB at this point in your build is just for looks

[mustangmaniac95]

yeah, the throttle body is just another piece of the puzzle when upgrading your heads and intake...are going to do a cam swap as well?
remember all of the other things you have to get also like: lifters, roller rockers, gaskets, and upgraded valve springs if you wanna splurge a little lol

[gripthenboost]

Originally Posted by 2sillystangs I hope i don't offend anyone especially slow90 by asking this question but it seems like you guys know what your talking about. How much power will a 306 with a b-cam and explorer top end make? The heads just have a bowl job to accommodate the 1.850 int./1.550 ext. valves. Also I'm gonna run a sn95 70mm maf and have full Mac exhaust. That's it! Thanks guys

I cant give you a hp number but since your from Ny i will break it down to you like this..

Your faster than...
Any STOCK civic other than a k20
Any evo without more than 18psi
Any STI or Wrx

But just to guess maybe 300hp or a little more depending on clutch and or drivetrain.

[wythors]

Wow. So much mis-information.

First off, do some research on that intake before you waste your money. Corral.net has had some extensive threads about the problems with them, up to and including a couple of cars burning to the ground due to the fuel rails leaking. I have never seen a car making any kind of power with a BBK.

With stock heads, a big intake isn't going to do much. If you want to improve your power on a budget, an Explorer GT40 intake can be had for under $150. I did a Cobra intake (same as the Explorer) on my buddy's otherwise stock 88 Saleen. We did a before and after dyno on it. Stock it put 198 HP to the rear wheels. With nothing more than an intake swap, using the stock throttle body, it did 220 HP. More importantly, it improves the horsepower between 2000-4000 rpm even more than that, plus it lets the engine breathe up close to 5800 rpm versus running out of steam at 4500. For the price you're going to pay for the BBK piece, you could get an Explorer intake and a pair of good GT40P heads and be in the 240-250 HP range to the tires.
As far as the 306 question, you say "Explorer top end". Are those worked GT40's from the Explorer or are they stock E7's with a little work? If they are E7's you're not making anywhere near 300. Probably more like 250. If they're GT40 heads, you're in the 270 range. Change out the heads for something that actually flows and you're probably in the low 300's.

[ryanw]

Originally Posted by wythors Wow. So much mis-information.

please explain ?

[brought_pain]

Originally Posted by slow90 Im buying the BBK upper intake and 70mm throttle body outta AM. my question is, should i upgrade the heads before it? will much difference be made there. Not sure about these stock ones. dont know anything about them. Heard it will restrict power buy having the stock ones and will virtually be pointless to do the intake swap if i leave stock heads on.... many thanks. yur local 8 hampster stang

Pass on bbk. The only reason I've considered one is to see what would happen if I used 2 pipes to tie the dual upper openings together. If you're talking about the box intake, definitely pass.

Yes, you should upgrade the heads first, if you can't do it all at once. A big intake will choke off at the heads, but good heads can utilise or even increase air velocity from small intake runners.

As Ryan said, you won't see much just upgrading the tb, its a mod that needs to support and be supported by other components, like the heads.

More and more people want too much money for gt40 stuff considering what you get. The gt40 stuff is over rated as being good for the money and so people want more money because of the hype.

Think about injectors and maf... Usually 19 and 24# injectors become weak points fast. You need bigger injectors to support more power.

[brought_pain]

Originally Posted by slow90 finding descent heads these days on CL and EBAY is nothing but an uphill battle. (used) if i spend the $500+ on heads alone it wont be at the least 3 months untill i can get the intake. im considering upgrading the TB for now and taking my money to other parts of the vechicle for now. Attepmt to save up the money to buy both; heads and intake, at the same time. good idea? or leave TB alone for now as well? now that i think about it, i do need a good set of drag radials..... lol

Be careful with cl eBay and classifieds. Just because its being sold as something doesn't mean that's exactly what you're getting. Port matching isn't uncommon, port work isn't uncommon, people selling parts that have been worked on and not mentioning the work isn't uncommon.

You want to go fast for cheap? Me too...

...it takes money, then it takes money because of the money, then it takes money Because.

[gripthenboost]

Originally Posted by wythors Wow. So much mis-information. First off, do some research on that intake before you waste your money. Corral.net has had some extensive threads about the problems with them, up to and including a couple of cars burning to the ground due to the fuel rails leaking. I have never seen a car making any kind of power with a BBK. With stock heads, a big intake isn't going to do much. If you want to improve your power on a budget, an Explorer GT40 intake can be had for under $150. I did a Cobra intake (same as the Explorer) on my buddy's otherwise stock 88 Saleen. We did a before and after dyno on it. Stock it put 198 HP to the rear wheels. With nothing more than an intake swap, using the stock throttle body, it did 220 HP. More importantly, it improves the horsepower between 2000-4000 rpm even more than that, plus it lets the engine breathe up close to 5800 rpm versus running out of steam at 4500. For the price you're going to pay for the BBK piece, you could get an Explorer intake and a pair of good GT40P heads and be in the 240-250 HP range to the tires. As far as the 306 question, you say "Explorer top end". Are those worked GT40's from the Explorer or are they stock E7's with a little work? If they are E7's you're not making anywhere near 300. Probably more like 250. If they're GT40 heads, you're in the 270 range. Change out the heads for something that actually flows and you're probably in the low 300's.

Very good points. I cant justify the purchase of the bbk with so many other options out there expecially if your on a budget. A track car is a track car, a street car is a street car, But the gt40 heads are a good upgrade if on a budget. But if you got money go afr or tfs.