ls1

[rdrr96]

alrighty so ive discussed this with a few guys that are pretty dang handy when it comes to cars... they arent just really frickin cool, they are also really frickin smart when it comes to car modifications. figured id post it up and see if anyone has done it.

LS1 throttlebody, anyone ever tried to put one of their 3800 car? they are considerably larger and would allow a lot more air into the intake manifold... as i discussed it with my friends they informed me about a lot of little details about our manifold, basically the MORE air i can shove in there the more it will pressurize and ram itself through the rest of the engine. :naughty: since my dad wont let me go forced induction with it still being in his name i figured this to be a nice alternative. any ideas on hp/tq gains? any ideas on difficulties i will have on the install? any ideas on how to adapt the MAF? (or if i even have too)

[youngsc]

Re: ls1

The TB on 3800's is already pretty big. If you put a bigger TB on there the only way you would get a real gain out of it is to balance with a larger exhaust and/or heads. As for the MAF you could probably relocate somewhere but it's a pretty direct path so unless you moved it off to the side. You could get rid of it only if you were running a speed density tune which would require a stand alone type setup, somebody correct me if I'm wrong. I'm not sure about the fitment but if you can get your hands on a LS1 TB then just take the old off and see what the diff's are. All in all I would say work on another part first, like the exhaust or just go with a whisper lid and CAI or all three, that would give you more gain than just the TB.

[UDLOSE98]

Re: ls1

Yea, i cant see any benifit from a larger throttle body unless you go forced induction.

[rdrr96]

Re: ls1

The TB on 3800's is already pretty big. If you put a bigger TB on there the only way you would get a real gain out of it is to balance with a larger exhaust and/or heads. As for the MAF you could probably relocate somewhere but it's a pretty direct path so unless you moved it off to the side. You could get rid of it only if you were running a speed density tune which would require a stand alone type setup, somebody correct me if I'm wrong. I'm not sure about the fitment but if you can get your hands on a LS1 TB then just take the old off and see what the diff's are. All in all I would say work on another part first, like the exhaust or just go with a whisper lid and CAI or all three, that would give you more gain than just the TB.

my car has a 3" intake and full exhaust. pacesetter headers, into a high flow cat, edelbrock cat back exhaust system 3". so the entire exhaust system has been replaced and im porting some heads right now for my car. upper and lower intake are both being modified. i started porting the 3800 TB but i figure itd be easier for me to just go LS1 big. i can get a 90mm with TB spacer for like 120 bucakroos. complete top end is getting redone with some designs that i have. ofcourse they are going on a friends car before i actually put them on my car. i want to make sure there is a change in the HP and Torque. ok so... now with a greater knowledge of my car. think itll be worth it?

[Fbody3400]

Re: ls1

If i'm not mistaken andrew (viper) is still using his stock throttle body and he is getting close to 500 hp

[UDLOSE98]

Re: ls1

i think that i dont even know who the connections will work.

Not to mention you will need to be A GOD! of hptuners to dial that thing in correctly.

[rdrr96]

Re: ls1

but isnt he forced induction... cuz im not able to go forced induction right now... so im trying to get as much air in there as possible. the more air we can get into our intake the more it pressurizes on the inside and the faster it will flow through the lower and into the heads. trust me ive done my homework about it. not to mention if you look inside our TB yeah its pretty good size... til you look at the throttle plate, i drops down considerably in size back there causing pressure to build inside the TB causing higher air intake temperatures. this is one thing that will help that.

[UDLOSE98]

Re: ls1

If i'm not mistaken andrew (viper) is still using his stock throttle body and he is getting close to 500 hp

definetly running stock tb

[Fbody3400]

Re: ls1

but isnt he forced induction... cuz im not able to go forced induction right now... so im trying to get as much air in there as possible. the more air we can get into our intake the more it pressurizes on the inside and the faster it will flow through the lower and into the heads. trust me ive done my homework about it. not to mention if you look inside our TB yeah its pretty good size... til you look at the throttle plate, i drops down considerably in size back there causing pressure to build inside the TB causing higher air intake temperatures. this is one thing that will help that.

Yes, he is FI, meaning he is flowing a lot more air than you :tup: If he is running a stock TB on a heavily modified car it doesn't make much sense to put something that is going to be a pain in the *** on a slightly modded car :poke:

[airattack111]

Re: ls1

Get a zzp ported tb, its astock one with p/p and has a larger throttle plate etc.

ALso get ported heads and intake and you'll be cruising, of course you'll need a full exhhaust, headers, and a good cai and tune.

[UDLOSE98]

Re: ls1

ZZP ported tb WILL NOT work with RWD 3800's

[Nikos95]

Re: ls1

ZZP ported tb WILL NOT work with RWD 3800's

Eh make your own.. lol only way to do most stuff if you have the equipment and tools. :)

[rdrr96]

Re: ls1

yeah but then i have to port my TB and get a newer larger throttle plate.

why wont the ZZP TB work with the RWD cars? looks basically the same to me, cept PP

[97rs4life]

Re: ls1

zzp tb will not work for our cars, the bolt pattern is different and such. Also if you are going NA there is no benefit from it because our tb's are huge already.

You can port a stock 95-98 tb by removing the whole maf bar and smoothing it all out but you will also need to use a 99 MAF along with the MAF tables to dial it in correctly with HP tuners. Ported TB's are sometimes tricky to dial in as well and it is best if you have a wideband.

Only going to see gains though if you are pushing some serious air through the tb.

[rdrr96]

Re: ls1

so i could make a TB spacer/ adapter to use the ported one but that would cost more than just get an LS1 tb