TC78 + 390ci..........will it make 900 RWHP....?
12-17-2012, 03:32 PM
#21
TC78 will choke out way early. If you have headers built you can keep A/C either way. You could fit something big in the battery area. Your going to have to make some sacrifices (such as relocating battery) to get your goals. I think the biggest you could fit between the rad and WP would be like the PT88.
12-17-2012, 04:37 PM
#22
Like the others said, I don't think a 390 with a TC78 will make 900 , or even 800 rwhp through a 4L80E.
HOWEVER, a few years back, Jose at FI made right at 1000 rwhp with a T76GTS on a 355 LT1 through an M6.
Also, forget about rwhp! What are your performance goals? I ask because I used to run a very similar combo. I had a 388 LTx with a T76GTS and a TH350. Even though it only made 700 rwhp, it would trap 146 mph in a full-weight+ 4th Gen. Everybody told me the turbo was way too small for the engine, and that my cam was all wrong (224/236), but IMO 146 is smokin' for a full-weight, stock appearing, pump-gas, low-budget combo.
On a separate build, I put together a 383 with a single T76GTS and put it on an engine dyno. It made 930 hp and 1050 ft-lb. I don't think the turbo was max'd out yet, but the engine owner was getting nervous and wouldn't let me push it any further.
HOWEVER, a few years back, Jose at FI made right at 1000 rwhp with a T76GTS on a 355 LT1 through an M6.
Also, forget about rwhp! What are your performance goals? I ask because I used to run a very similar combo. I had a 388 LTx with a T76GTS and a TH350. Even though it only made 700 rwhp, it would trap 146 mph in a full-weight+ 4th Gen. Everybody told me the turbo was way too small for the engine, and that my cam was all wrong (224/236), but IMO 146 is smokin' for a full-weight, stock appearing, pump-gas, low-budget combo.
On a separate build, I put together a 383 with a single T76GTS and put it on an engine dyno. It made 930 hp and 1050 ft-lb. I don't think the turbo was max'd out yet, but the engine owner was getting nervous and wouldn't let me push it any further.
12-18-2012, 05:22 AM
#23
Like the others said, I don't think a 390 with a TC78 will make 900 , or even 800 rwhp through a 4L80E.
HOWEVER, a few years back, Jose at FI made right at 1000 rwhp with a T76GTS on a 355 LT1 through an M6.
Also, forget about rwhp! What are your performance goals? I ask because I used to run a very similar combo. I had a 388 LTx with a T76GTS and a TH350. Even though it only made 700 rwhp, it would trap 146 mph in a full-weight+ 4th Gen. Everybody told me the turbo was way too small for the engine, and that my cam was all wrong (224/236), but IMO 146 is smokin' for a full-weight, stock appearing, pump-gas, low-budget combo.
On a separate build, I put together a 383 with a single T76GTS and put it on an engine dyno. It made 930 hp and 1050 ft-lb. I don't think the turbo was max'd out yet, but the engine owner was getting nervous and wouldn't let me push it any further.
HOWEVER, a few years back, Jose at FI made right at 1000 rwhp with a T76GTS on a 355 LT1 through an M6.
Also, forget about rwhp! What are your performance goals? I ask because I used to run a very similar combo. I had a 388 LTx with a T76GTS and a TH350. Even though it only made 700 rwhp, it would trap 146 mph in a full-weight+ 4th Gen. Everybody told me the turbo was way too small for the engine, and that my cam was all wrong (224/236), but IMO 146 is smokin' for a full-weight, stock appearing, pump-gas, low-budget combo.
On a separate build, I put together a 383 with a single T76GTS and put it on an engine dyno. It made 930 hp and 1050 ft-lb. I don't think the turbo was max'd out yet, but the engine owner was getting nervous and wouldn't let me push it any further.
100% street car. It will never see a drag track. Roll races only. 40-170mph.
Driven weekends, good weather only. Fun car. E85 w/FMIC. Full weight, full interior. Mini-tubbed.
.
12-18-2012, 05:51 AM
#24
That's not incredibly helpful when it comes to determing what parts to put in it, as there is no actual stated performance goal.
12-18-2012, 08:16 PM
#28
How about this turbo:
GT-88
1400 (135lbs/min)
3RD-94mm
1.08, 1.23
******I wish it wasn't like pulling teeth to find out the outer measurements of turbos. I need to know if it'll spool fast with my 390ci and if it'll fit front mount....or the battery location.
.
GT-88
1400 (135lbs/min)
3RD-94mm
1.08, 1.23
******I wish it wasn't like pulling teeth to find out the outer measurements of turbos. I need to know if it'll spool fast with my 390ci and if it'll fit front mount....or the battery location.
.
12-18-2012, 08:47 PM
#30
The stated goal was 900 rwhp, but if that were the goal then a 4L80E wouldn't be part of the equation because it'll eat up 100-150 rwhp vs a T56. Furthermore, a rwhp number is absolutely no guarantee of actual performance.
12-18-2012, 08:52 PM
#31
No, as I mentioned earlier.....this car will NEVER see a drag track.....ever.
ROLL racer only........so the goal is simple. The hardest pulling car possible from 40-170mph.
Thats the only goal I have.
.
Last edited by LS6427; 12-18-2012 at 09:01 PM.
12-18-2012, 09:06 PM
#32
FormerVendor
No they understood.....
I guess that would be top fuel but traction would be hard to achieve on the street.
As they said "fastest" isn't a goal. There are FGT's, Vipers and Gallardos that roll race with 1800+hp, so are you saying you want that or more or do you just want to stick with 900 wheel?
I guess that would be top fuel but traction would be hard to achieve on the street.
As they said "fastest" isn't a goal. There are FGT's, Vipers and Gallardos that roll race with 1800+hp, so are you saying you want that or more or do you just want to stick with 900 wheel?
Last edited by qqwqeqwrqwqtq; 12-18-2012 at 09:12 PM.
12-18-2012, 09:12 PM
#33
Exactly. As fast as possible is not a goal. If it were, then why stop at twin 88's and only one engine without nitromethane?
The stated goal was 900 rwhp, but if that were the goal then a 4L80E wouldn't be part of the equation because it'll eat up 100-150 rwhp vs a T56.
The stated goal was 900 rwhp, but if that were the goal then a 4L80E wouldn't be part of the equation because it'll eat up 100-150 rwhp vs a T56.
Furthermore, a rwhp number is absolutely no guarantee of actual performance.
I'm asking about 900 RWHP because I've been hearing that 1,000+ will simply be unusable....so I backed it down a little as a power goal. Even though my friends 1280 RWHP TT Viper hooks just fine and hammers out 40-170mph runs consistently and with sickening PULL. SO....if I can learn to hook 900 RWHP, I'll turn up the boost little by little.........and so on.
.
12-18-2012, 09:13 PM
#34
You don't have to take a car to the track to have an actual et goal. It's just something people can actually relate to. The only major difference between a roll setup and a dig setup is gearing, so an et number still applies. It's just something people can relate to so they can offer some insight. If you're only concerned about rolls, fast spool isn't really a huge concern because you can brake boost. An t4 s480 with 92mm turbine would be the absolute smallest I would run on a 390 but, again, they're pretty large. Its going to take a pretty big (physically) turbo to make 900 through an 80e.
12-18-2012, 09:16 PM
#35
Well that simplifies things. To answer your original question, a TC78 will not be "the hardest pulling car possible". Twin 88's won't do it either. As it stands, the hardest pulling car possible from 40-170 is a top fuel dragster, but even those are greatly restricted by class rules. You need a top fuel dragster, but without all the displacement, aerodynamic, tire size, ignition system, and blower size rule limitations.
12-18-2012, 09:17 PM
#36
No they understood.....
I guess that would be top fuel but traction would be hard to achieve on the street.
As they said "fastest" isn't a goal. There are FGT's, Vipers and Gallardos that roll race with 1800+hp, so are you saying you want that or more or do you just want to stick with 900 wheel?
I guess that would be top fuel but traction would be hard to achieve on the street.
As they said "fastest" isn't a goal. There are FGT's, Vipers and Gallardos that roll race with 1800+hp, so are you saying you want that or more or do you just want to stick with 900 wheel?
I'll just start at around 1,000 RWHP and work my way up I guess.....
My new AES 390ci is being installed as we speak at Lashway Motorsports here locally. In about 6 months I'll have my builder build me an iron LSX 402ci and use 6 boly heads and go with twin 88's......like NRE does with there crazy LSX TT builds.
This ~1,000 RWHP will be my learning set-up.........
.
12-18-2012, 09:19 PM
#37
OK, so you want a turbo that is capable of putting over 1000 to the tires through an 80? It's going to be gigantic. You're going to need to move a lot of stuff around just to get the turbo in there, not to mention the at least 4" downpipe.
12-18-2012, 09:23 PM
#38
Well that simplifies things. To answer your original question, a TC78 will not be "the hardest pulling car possible". Twin 88's won't do it either. As it stands, the hardest pulling car possible from 40-170 is a top fuel dragster, but even those are greatly restricted by class rules. You need a top fuel dragster, but without all the displacement, aerodynamic, tire size, ignition system, and blower size rule limitations.
LOL.....we're getting off topic a bit.
I'm not looking for the worlds fastest car so I can hold the world record.
I'm just saying...with my 390ci...E85....street car....A/C.....and with a single turbo-------I want to use a turbo that will make my car as fast as possible for that kind of roll race......
By the end of next year, I'll have my 402ci LSX iron engine so I can build something like "INTMD8" is talking about......1800+ HP........
and NO, I don't want to just wait till then.....I want to boost this new motor.
.