Turbo size for a 402???
Thanks, I sure hope so. One more question, is it true that the T76 is a 70mm? Does anyone know what 70mm turbo is in the HiFlo kit? They don't have very much info on their website. I pm'ed Marko but I haven't gotten a response yet. I am sure they are busy trying to get the first kits together though.
Yea if you go low comp 402 then go T-88, I hadf a convo with one of the guys on the board a little while ago about turbo sizes and he was building a turboed 383 and he said even on his 383 the T-76 was running out of steam in the upper rpms. If you want it to spool quicker and have a littlemore low end power go with the T-76, however if your seeking more HP in the upper rpm range (4K-7K) then go with the bigger T-88.
Originally Posted by N20LS1
I would say between a t76 and a t88.
Would a 70mm be a good compromise between the two?
Originally Posted by SSblack98
If a 70mm is between a T76 and T88 then what mm are T76 and T88's?
Would a 70mm be a good compromise between the two?
Would a 70mm be a good compromise between the two?
WOW... You have your info alllllllll messed up........
A 70mm Turbi.. ie a T70 is NOT bigger then T76=76mm Turbo ro a T88= 88mm Turbo......
So to answer your question...... dont go with either......
You are going to run out of Turbo very very soon running a 402ci motor....
Plus the back pressure...
A T76.... 76mm turbo would work but........ is not ideal and who wants to spend $$ twice for the same thing??? No one...
Go with the T-88 .... and be done with it.
Oh I was told that T76 and T88s were Garrett turbos and that the numbers didn't necessarily indicate the mm. I thought that sounded a little goofy myself so I am glad I asked even though now I feel dumb. 
I guess I also got confused when some are saying that a 70mm would probably be ok but a T76 would probably be too small. I am definitely confused for sure. I'm not too sure about running a T88 on the street yet. I think I will try to get a 80mm. Who makes the "best" 80mm?
I guess I also got confused when some are saying that a 70mm would probably be ok but a T76 would probably be too small. I am definitely confused for sure. I'm not too sure about running a T88 on the street yet. I think I will try to get a 80mm. Who makes the "best" 80mm? LS1 Tech Stories
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Verdad Gallardo Why are you scared of a T88 on the street???
its not like were driving an Import here..... were talking about Four Hundred and two Cubic Inches........
There shouldnt be that much Lag with it..... Look at PurEvils Car....667hp 687tq at only 10psi .......
its not like were driving an Import here..... were talking about Four Hundred and two Cubic Inches........
There shouldnt be that much Lag with it..... Look at PurEvils Car....667hp 687tq at only 10psi .......
Originally Posted by 2001-WS6
Innovative Turbo has a good 80mm unit. It's the upgrade turbo for the TTi race kit.
Rick
Rick
I agree that the a 402 should have plenty of low end to make up for a lot of lag. Does the T88 come with ball bearings? I guess it would be better to have some lag for traction purposes as long as it doesn't come on like a light switch which is what I am afraid the T88 will. I know with 600+rwhp traction is going to be a big problem on the street anyway, I just don't want the turbo to come on so hard that I can't even keep traction at high speeds like on the interstate.
Originally Posted by SSblack98
I agree that the a 402 should have plenty of low end to make up for a lot of lag. Does the T88 come with ball bearings? I guess it would be better to have some lag for traction purposes as long as it doesn't come on like a light switch which is what I am afraid the T88 will. I know with 600+rwhp traction is going to be a big problem on the street anyway, I just don't want the turbo to come on so hard that I can't even keep traction at high speeds like on the interstate.
See now your saying your afraid of the turbo coming on to soon...... with a T88..... what do you think its going to do with a smaller unit like a 80 or 76mm wheel??? Come on even faster.......
You should have no problems with a T88..........
JZ we need to do a little thread about turbo's for people because like you said..... they think some of these turbo's are to huge for our motor's..
Originally Posted by SSblack98
I agree that the a 402 should have plenty of low end to make up for a lot of lag. Does the T88 come with ball bearings? I guess it would be better to have some lag for traction purposes as long as it doesn't come on like a light switch which is what I am afraid the T88 will. I know with 600+rwhp traction is going to be a big problem on the street anyway, I just don't want the turbo to come on so hard that I can't even keep traction at high speeds like on the interstate.
600+rwhp? Hell with a forged 402 and a T-88 more like 700-800+ rwhp!
Originally Posted by 98Z28MASS
600+rwhp? Hell with a forged 402 and a T-88 more like 700-800+ rwhp!
Apparantly bigger is better but I'm just trying not to be too rediculous and end up with a turbo that supports 1000+hp when I don't really need it. Am I correct in that a T88 is NOT a ball bearing unit? Is it available as such? I know the BB turbos are salty but I only want to do this once and so I'm thinking BB would be the way to go.
88mm with a T4 flange maxes out around 1200 hp at the crank.
88mm with a T6 flange maxes out around 1400 hp at the crank.
A lot of our conversations on here, center our desire to spec a combination that fits our individual needs. The problem is that most turbo companies don't give us the answers we want since (a) it's not good to generalize and (b) half the time they are not sure either since they have not measured backpressure and other issues first hand but are relying on information passed on by costumers.
For 650-700rwhp you need somewhere between a 76mm and a 88mm assuming a T4 flange.
88mm with a T6 flange maxes out around 1400 hp at the crank.
A lot of our conversations on here, center our desire to spec a combination that fits our individual needs. The problem is that most turbo companies don't give us the answers we want since (a) it's not good to generalize and (b) half the time they are not sure either since they have not measured backpressure and other issues first hand but are relying on information passed on by costumers.
For 650-700rwhp you need somewhere between a 76mm and a 88mm assuming a T4 flange.
Originally Posted by SSblack98
I was speaking of pump gas. I'm hoping for around 650rwhp on 93 octane. Then maybe 750-800 in race form. I have been trying to really research this but it seems like everyone has a different opinion as to turbo size.
Apparantly bigger is better but I'm just trying not to be too rediculous and end up with a turbo that supports 1000+hp when I don't really need it. Am I correct in that a T88 is NOT a ball bearing unit? Is it available as such? I know the BB turbos are salty but I only want to do this once and so I'm thinking BB would be the way to go.
Apparantly bigger is better but I'm just trying not to be too rediculous and end up with a turbo that supports 1000+hp when I don't really need it. Am I correct in that a T88 is NOT a ball bearing unit? Is it available as such? I know the BB turbos are salty but I only want to do this once and so I'm thinking BB would be the way to go.
Here again... why.... why go with a ballbearing Turbo...... Twice the money and yes they help with spool time but are the really worth double the price........ my .02.... no..
Now i was talking Pump gas,,, 93 octain...
PurEvils 667rwhp was on pump gas on low boost..... 10 psi.... easier on everything..... with only 10 psi.... Just because you have a turbo that can support 1000hp doesnt mean you have to go ***** out all the time..... and use it all...
Kyle
10 Second Club
Joined: Aug 2004
Posts: 328
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From: Houston
Originally Posted by Pro Stock John
MM pipe?
My recollection is that a 76mm might do 1000hp, and the fastest example is Mike Murillo going high 8's. I don't know what size engine that is, but if it's small cubes it makes sense.
My recollection is that a 76mm might do 1000hp, and the fastest example is Mike Murillo going high 8's. I don't know what size engine that is, but if it's small cubes it makes sense.
Originally Posted by NA$TY-TA
Why are you scared of a T88 on the street???
its not like were driving an Import here..... were talking about Four Hundred and two Cubic Inches........
There shouldnt be that much Lag with it..... Look at PurEvils Car....667hp 687tq at only 10psi .......
its not like were driving an Import here..... were talking about Four Hundred and two Cubic Inches........
There shouldnt be that much Lag with it..... Look at PurEvils Car....667hp 687tq at only 10psi .......
lol i wish i had lag, then i could over 4k without going sideways at 80
Originally Posted by SSblack98
I was speaking of pump gas. I'm hoping for around 650rwhp on 93 octane. Then maybe 750-800 in race form. I have been trying to really research this but it seems like everyone has a different opinion as to turbo size.
Apparantly bigger is better but I'm just trying not to be too rediculous and end up with a turbo that supports 1000+hp when I don't really need it. Am I correct in that a T88 is NOT a ball bearing unit? Is it available as such? I know the BB turbos are salty but I only want to do this once and so I'm thinking BB would be the way to go.
Apparantly bigger is better but I'm just trying not to be too rediculous and end up with a turbo that supports 1000+hp when I don't really need it. Am I correct in that a T88 is NOT a ball bearing unit? Is it available as such? I know the BB turbos are salty but I only want to do this once and so I'm thinking BB would be the way to go.