RotaryPicha

iTrader: (2)

I was wondering about ITB's and what differnce they make. I have a 88 n/a SE with only headers and ehxaust. Would it be a good idea to upgrade the throttle body.

Aaron Cake

iTrader: (1)

Misinformation and useless posts deleted.

The thing you have to ask yourself is how far you want to go with an NA setup.

ITBs and an intake manifold change will make the car scream higher up in the rev range. I recently helped with a streetport 12A with a set of ITBs that made ~140 HP at the wheels. This out of an engine making 100HP stock. Not too bad.

However the downside is that you need to convert to a full standalone, and the short runner intake manifold will hurt your midrange for sure.

The question is whether it is worth the cost...Maybe. If you're a hard core NA person and want something fun to drive that feels like a race car and has real punch up top (still not more then 200HP though) then it may be worth it. If you are thinking it will be a quick or easy swap, then no.

rglbegl

Similiar question about throttle bodies


How much power will the stock throttle body handle?
If you stay N/A and do a huge street port, or even a bridge port, can the stock intake handle enough air and gas flow to make the bridgy worthwhile?
To touch 200HP would you need to change injectors?(I am guessing yes, but not sure)
And can you get away with the stock throttle body with new injectors (if needed) and a computer (stand alone or piggyback)?

initial D is REAL!

They sound and look really cool

RotaryPicha

iTrader: (2)

good ? real beagel

Aaron Cake

iTrader: (1)

You've now posted this to two different threads.

About 600 HP.

If we are talking about the NA engine, then a bridgeport breaks it. The stock NA intake is designed to use the closing pulse from one rotor to force air into the opposite rotor. Bridgeports don't close, so this effect is lost. What you end up with is an intake with ultra long runners that don't favor high overlap ports.

Maybe. With a standalone probably not. But very, very few people touch 200HP NA on a 13B without radical porting (ie. bridge).

You can upgrade the injectors if you run a standalone or piggyback, but why? You'll almost never need more fuel if you stay NA.

rglbegl

I prefer to bump several old thread before starting a new one.





So a Bridgeport N/A would need some sort of aftermarket throttle body then?
I know there are several parts that would need to be replaced. I am prepared for that. But what you are saying is that the stock intake will rely on a non overlapping port to work correctly. therefore on an N/A engine, it is useless once you go bridge, thus it will definately need an aftermarket TB?

I am just researching this before I start hacking up an engine. I have access to an 87 n/a and plenty of money to make it a beast. I am just trying to figure out where the money will be best spent to make the most power out of what is stock vs. what can be added.

Aaron Cake

iTrader: (1)

A bridgeport NA will want an entirely new intake manifold, which dictates (usually) a new throttle body as well.

If you want to make the car a beast, then turbocharge it. With a full bridge and good tuning you should do 250HP or so and remain fairly streetable. It will still be pretty damn loud and get lousy mileage. Slap a smallish turbo on it like the GT30 or a TO4S and you'll make 300HP all day long with decent mileage off boost and a much more tolerable exhaust.

initial D is REAL!

But how much torque? Hee hee

rglbegl

Thank you for your help.