Possible gains from a 1g throttle body on a 2g?

[SoCalGST]

Now i know the 1st gen throttle body is 60mm, which is what, like 8mm larger than mine?

Well, i'm just wondering what kind of gains i could expect. Does the car feel significantly more powerful? I know in my uncles s10 he put a throttle body spacer in it and I could feel the difference.

Ok I feel im rambling...so:

1. Will power gains be noticeable?

2.Is this mod really worth it?

Thanks guys.

 

[chicagoboostin]

would i do it?.. yea

will you notice a diffrence?... no

but it will do some good, so if u have a 1g tb around go ahead

 

[alex99gst]

It will improve throttle response and add some top end by allowing more air to flow through it. I think any mod to improve airflow is significant enough, but I wouldn't go too far out of my way for it (if you had to spend more money than you think its worth)

 

[Turbocharged]

I got mine off the trader for $40 and replaced the shaft seals fo about 50 cents. The turbo spools sooner in the rpms and there is a noticable increase in low end torque. At WOT I would say there is little to no increase. But for $41 it was one of the best mods Ive done.

 

[Generation X]

You would either have to use a 1g intake manifold, or have your 2g intake manifold ported to match the 1g tb size in order to see any real gains.

 

[pboglio]

1) Power gains will be noticeable.

2) Yes, its very much worth it.

You have to port match obviously, no biggie. You should feel some more topend. Theory says it shouldn't make a difference. However, most guys who install a 1g tb notice the difference right away.

 

[Catbox_95]

I disagree. I put one on my car, along with a 1G intake. Yeah, MAYBE there's a SLIGHT difference, but it's definitely not much. Some people install a K&N filter and think they've shaved off a second in the quarter, but truth is, side by side, identical cars with a 1g tb and a 2g tb will be much the same.

 

[Turbocharged]

Porting the manifold is no big deal. Its aluminum so its really easy to cut into. It took me 10 minutes to port match the manifold and 5 minutes to port match the throttle body elbow. For the money and effort its definately worth it.

 

[guitarXgeek]

Just because you don't feel a difference doesn't mean it's not there I bet you will see some gains in airflow on a logger, for sure. How much gain.. well it all depends on your current setup and how much the throttle body is restricting flow. Any turbo larger than a t-2small should see some airflow gains. No matter how small the gains are, it's still there

 

[oztofrdm]

I disagree. I put one on my car, along with a 1G intake. Yeah, MAYBE there's a SLIGHT difference, but it's definitely not much. Some people install a K&N filter and think they've shaved off a second in the quarter, but truth is, side by side, identical cars with a 1g tb and a 2g tb will be much the same.

Well from looking at your profile and gallary you still are running a t2Slow, thats why you probably didnt feel a difference. And your running a vented bov so thats two for you I think if you had anything bigger than a t25 and you put the 1g tb on, you could feel it on the old butt-o-meter.

 

[Catbox_95]

Well from looking at your profile and gallary you still are running a t2Slow, thats why you probably didnt feel a difference. And your running a vented bov so thats two for you I think if you had anything bigger than a t25 and you put the 1g tb on, you could feel it on the old butt-o-meter.

You get 1 point for the t25 insult, but none for the vented BOV. Venting a BOV means nothing but a nifty woosh sound. In my defense though, the t25 is gone and a Garret T3/T4 hybrid is in it's place with a tubular header and fmic. And to stay on thread topic, I should mention that I certainly do agree that with other high air-flow mods, a larger tb will definitely make a difference. In other words, don't just put on a larger tb if you don't ever plan to do another mod. But if it's all part of the big plan, then dollar-for-dollar you can't beat it.

 

[98spydert]

I disagree. I put one on my car, along with a 1G intake. Yeah, MAYBE there's a SLIGHT difference, but it's definitely not much. Some people install a K&N filter and think they've shaved off a second in the quarter, but truth is, side by side, identical cars with a 1g tb and a 2g tb will be much the same.

If you put a 1G intake on a 2G head, you probably LOST top end.

 

[Catbox_95]

If you put a 1G intake on a 2G head, you probably LOST top end.

Why?

And no I didn't.

 

[93talonkid]

hey, yes it helps, but it wont be too noticable, so save yourself some trouble, and just go out to your luncal junk-yard and pull a 1g intake manifold, the throttle body, and keep your 2g throttlebody elbow. that will make a much more significant difference than just a throttle body.


sean

 

[93talonkid]

Well from looking at your profile and gallary you still are running a t2Slow, thats why you probably didnt feel a difference. And your running a vented bov so thats two for you I think if you had anything bigger than a t25 and you put the 1g tb on, you could feel it on the old butt-o-meter.

the only time venting is even a problem is with stock BOV's because they open at idle, any aftermarket BOV should do fine. i run vented on my new DSM.

 

[98spydert]

the only time venting is even a problem is with stock BOV's because they open at idle, any aftermarket BOV should do fine. i run vented on my new DSM.

I love having that "misinformation/hearsay" button.

This statement is WRONG. Read before posting. Here's a good start: http://www.dsmtuners.com/forums/showthread.php?t=834&highlight=vent+blow+valve+stock

 

[98spydert]

Why?

And no I didn't.

In your engine bay shot in your gallery, that looks like a 2G head to me. But regardless, the much larger intake ports on the 1G intake manifold don't match up to the 2G ports at all. You basically have 20-30% or so of the intake manifold runner leading to a flat wall which does horrible things to velocity and turbulence.

 

[droptopgst]

Could not tell any diff. when I installed mine. I am runin da fiddy trim too. No t2-small here!

 

[hellotbone]

the only time venting is even a problem is with stock BOV's because they open at idle, any aftermarket BOV should do fine. i run vented on my new DSM.

Don't spread misinformation venting = bad

BTW I got 3 misinformation emails on this dude you been reported! I have also given you negative rep on this thread for what you said.

 

[Drifte]

heres what i have gotten out of this. correct me if im wrong.

-2g tb elbow is bigger than 1g
-2g tb is smaller than 1g
-2g intake manifold has smaller runners
-2g head ports are smaller

I remember reading this but it may not be the facts: " 1g head fits on 2g, but not vise versa"

and wouldnt the 2g turbo head be a great upgrade for a 1g na (if it would fit)


Why im asking all this is i have a spare 1g head, intake mani; and a non-turbo tb. (is that thing bigger than the 1g turbo tb?!)

 

[alex99gst]

The 1g throttle body elbow has a larger opening, but then it necks down after that. The 2g throttle body elbow has a slightly smaller opening into the throttle body, but doesn't neck down like the 1g, so many people buy the 2g throttle body elbow and just port match it to the 1g throttle body

 

[DiamondStarM]

Venting a BOV means nothing but a nifty woosh sound.

Wow its so simple now, and to think that all along I thought improper venting causes richness between shifts, stalling, and ingesting unmetered, unfiltered air.

 

[arash15]

Now i know the 1st gen throttle body is 60mm, which is what, like 8mm larger than mine?

Well, i'm just wondering what kind of gains i could expect. Does the car feel significantly more powerful? I know in my uncles s10 he put a throttle body spacer in it and I could feel the difference.

Ok I feel im rambling...so:

1. Will power gains be noticeable?

2.Is this mod really worth it?

Thanks guys.

do the mod. it effectively aids the other mods and you will produce more power. here look at this...http://www.roadraceengineering.com/2gtbswap.htm

 

[Catbox_95]

In your engine bay shot in your gallery, that looks like a 2G head to me. But regardless, the much larger intake ports on the 1G intake manifold don't match up to the 2G ports at all. You basically have 20-30% or so of the intake manifold runner leading to a flat wall which does horrible things to velocity and turbulence.

You have a keen eye and yes, you are correct about my head being a 2G head. However, you didn't read my mods and notice that the intake and head are port-matched, and the head is ported and polished. The amount of metal that came out of the intake ports to match up to the 1G intake is phenomenal. I used to have a picture posted of the head during the porting, where an intake port was half ported, half stock. The picture looked like a fake Photochopping.

So, back on topic - a 1G intake bolted to a 2G head is useless, in fact worse, unless it is at least all port-matched.

 

[crankbender]

Not going to get into this alot other than to say....DO NOT VENT WITHOUT UNDERSTAND WHAT IS REQUIRED TO DO SO.

you know this thread will probably get read over and over and now the whole itea of venting will return when it was almost squashed. Read the other threads about this...they go back to the beginning of the site.