build suggestions

[Houseofperformance]

it´s time for an upgrade - currently i´m running mildly ported vortecs, 412 cam, bigger valves, forged internals, 4 bolt mains, a pte 44 + 3" downpipe and 50´s injectors with 15 psi boost, 2800 stall in the 4l80e.
it runs strong and flawless but i don´t think this combo brings out the full potential of the engine.

i have following parts already: large front mount a/a intercooler, a bbk throttle body, 90° upper intake plenum facing the front, edelbrock lower intake converted for efi (in the works at rpm) - i guess with this parts i might run out of injector and turbo when raising the boostlevel to around 18, maybe 20psi

the truck is street driven, so i´m mainly looking for fast spool, good response and lower end tourque - i was thinking a turbo in the 67 range or maybe a ballbearing turbo and 75# injectors should do the trick but i´m open for your suggestions - i will also contact nolan for one of his custom tunes.

i also have some general questions for you guys:
- will i need alky injection to savely run this boost levels in a daily driver?
- do the 75# injectors sacrifice drivebility, idle etc.?
- what kind of hp can i expect with a save tune and 20psi boost?
- any other upgrades reconmended?
- will my single walpro support this built or will i need a upgraded pump?

thanks!

 

[leadfoot]

Re: build suggestions

it´s time for an upgrade - currently i´m running mildly ported vortecs, 412 cam, bigger valves, forged internals, 4 bolt mains, a pte 44 + 3" downpipe and 50´s injectors with 15 psi boost, 2800 stall in the 4l80e.
it runs strong and flawless but i don´t think this combo brings out the full potential of the engine.

i have following parts already: large front mount a/a intercooler, a bbk throttle body, 90° upper intake plenum facing the front, edelbrock lower intake converted for efi (in the works at rpm) - i guess with this parts i might run out of injector and turbo when raising the boostlevel to around 18, maybe 20psi

the truck is street driven, so i´m mainly looking for fast spool, good response and lower end tourque - i was thinking a turbo in the 67 range or maybe a ballbearing turbo and 75# injectors should do the trick but i´m open for your suggestions - i will also contact nolan for one of his custom tunes.

i also have some general questions for you guys:
- will i need alky injection to savely run this boost levels in a daily driver?
- do the 75# injectors sacrifice drivebility, idle etc.?
- what kind of hp can i expect with a save tune and 20psi boost?
- any other upgrades reconmended?
- will my single walpro support this built or will i need a upgraded pump?

thanks!

Someone made an Excel spreadsheet of ball park mods This is a good starting point, but it has not been updated in awhile. :2cents:

May be on this site somewhere -if not on Josh's site.

 

[JSM]

Re: build suggestions

Here is link to spreadsheet. I just checked it over and its still accurate IMO. Its a guide though, not a you must buy that exact cam deal.

http://www.syty.net/forums/showthread.php?t=56401

What are your goals? That motor could run a 10.

I'd suggest a 67ish turbo and 65# injectors and custom tune, should net a low 11 easily.

 

[qbnkiller]

Re: build suggestions

Sounds like you have a nice build in progress! If you would like to keep really nice spool, I would suggest a 62mm like I am running. In a lighter Syclone, it should bring you well into the 10's

 

[bezerk]

Re: build suggestions

i agree on the 67 and 65''s i have the same setup. and i ''hope'' to make high 10 pass this year.
i don't have problems spooling the 67 at all. it's a dbb though

 

[Houseofperformance]

Re: build suggestions

thanks guys!

since we don´t have many drag races here, but a lot of high dollar sports cars roaming the streets my main goal is to piss them off in a ****ed up looking, boxy pickup whenever possible;-)
so it´s mostly about response and drivebility - how is the spool of the 62 compared to a 67 with ballbearings, and what´s the hp rating difference of this 2 turbos?
the 65# injectors are the largest ones that don´t need the driver upgrade in the ecm?

 

[qbnkiller]

Re: build suggestions

I am running a standard TCI 3k-stall converter. I can stomp it and be up to full boost by 3400. Driving around town, you would not notice it at all.

http://www.youtube.com/watch?v=n_gRNFR-i58

This video is me just driving around...the tune has been improved from here..it spools a little faster also. This is a standard journal-bearing turbo, so its not expensive to rebuild. It is also capable of some real good power.

 

[JSM]

Re: build suggestions

If your doing almost all street driving I prefer a bit smaller turbo, they are not as fast ET wise but much more fun on the street when they spool up instant.

Hardman's typhoon we have been working on has a I think 72 turbo ball bearing turbo with a VERY small exhaust housing. Dual intercoolers (air to air and water-air). Carb converted intake. 5psi by 1800 rpm and it gets stupid quickly. Very fun on the street, probably would spool up too fast on full tilt at track though.

 

[bezerk]

Re: build suggestions

i had a pt61 turbo on my ty, and upgraded it to a dbb pt67. spoolup was alot faster. and didn't feel as stupid with a highg k stall. with the 67's i think i also hit fullboost around 3500rpm. it's instant.

 

[ghettosled]

Re: build suggestions

billet 67 with 60# injectors is a great street combo. Mid-Low 11s with 17-18 psi and very mild meth tune.

 

[Houseofperformance]

Re: build suggestions

thanks guys - that´s helpful already. guess i´ll go for the 67 bb and 65# injectors - pretty much the same setup berzerk is running - mike, is the billet 67 a ballbearing turbo?

another thing: will my walpro support this build? i could get a used walpro double pumper localy, or should i get an areomotive setup?
should i upgrade my rearend at the expected power level or will it be ok when running street tires?

 

[UR50SLO]

Re: build suggestions

We run that 61DBB turbo and are very happy with the responce from it. I'm sure the 67dbb would be fine also.
Ball Bearing Turbos are way diffrent. I won't buy anything else after having this one.
Sounds like a fun truck!
~Scott