Competition What smaller turbo?

[slomodiesel]

Dear ladies and Gents: I am going to put twins on but can't decide on which smaller turbo to run. My big is a garrett t76 and I will BOV it to 50lbs. max. I have a htb2 that is rebuilt but I think that is too big. I want either another garrett or an hx40 (I think!) but do you guys have any ideas? I plan on running a wastegate and limiting boost to the little guy at 25 to 30 lbs and my truck is as follows - 98. 5 5 in exhaust , edge comp not hooked up, hx35 now, 1200 torque transmission and low stall billet conv, extral large (dc9 hydraulic oil cooler) trans cooler, bd exhaust ported manifold, afe +2, guages, and bullydog propane kit. I just use the propane for mileage (about 3 to 4 mpg while towing and my goal is to run 50lbs boost with quick response and low egt's. yes I will put head studs and bigger (150's) injectors when I put the compounds on. Any tips on the little guy? I think I can be bigger than the hx35 and still spool quicker compounding with reduced temps- you tell me

 

[slomodiesel]

oops- fass 150 and new vp44 and bigger lines 5/8 in with 5/8 in draw straw also

 

[DCreed]

the HTB2 is a 62/65/14? if only 50psi just run the HTB2 alone, if your goal is only 400hp you dont need twins. ... or if you must, go with a 57/12 S300 or similar garret for the top. and 5/8 fuel line is way overkill, esp with a 1/4 return line! the low stall means you need a VERY responsive turbo or SMALL twins (towing BDs). with 150hp inj. and no tap you'll have 300hp @wheels hardly needs twins for that! keep it real and you'll be happier.

 

[slomodiesel]

mistake again- my other turbo is a H2C

 

[slomodiesel]

And my torque goal is 1000 and horsepower then 500

 

[DCreed]

Dear ladies and Gents: I am going to put twins on but can't decide on which smaller turbo to run. My big is a garrett t76 and I will BOV it to 50lbs. max. I have a htb2 that is rebuilt but I think that is too big. I want either another garrett or an hx40 (I think!) but do you guys have any ideas? I plan on running a wastegate and limiting boost to the little guy at 25 to 30 lbs and my truck is as follows - 98. 5 5 in exhaust , edge comp not hooked up, hx35 now, 1200 torque transmission and low stall billet conv, extral large (dc9 hydraulic oil cooler) trans cooler, bd exhaust ported manifold, afe +2, guages, and bullydog propane kit. I just use the propane for mileage (about 3 to 4 mpg while towing and my goal is to run 50lbs boost with quick response and low egt's. yes I will put head studs and bigger (150's) injectors when I put the compounds on. Any tips on the little guy? I think I can be bigger than the hx35 and still spool quicker compounding with reduced temps- you tell me

OK, some basics here. If you run the primary"big"(t76 for you) @50psi and the top turbo @30psi you'll have near 80psi total. Also even with the 150hp inj. you NEED to hook up the pump tap to utilize twins. Again for your goals a 57/12 s300 and a 66/16 s300 set I think will be what you are looking for. BD (among others) makes such a set. Try calling the many shops on the sponsors page and after you talk to ALL of them, make an INFORMED decision with the vender of your liking!

 

[Tomeygun]

OK, some basics here. If you run the primary"big"(t76 for you) @50psi and the top turbo @30psi you'll have near 80psi total. Also even with the 150hp inj. you NEED to hook up the pump tap to utilize twins. Again for your goals a 57/12 s300 and a 66/16 s300 set I think will be what you are looking for. BD (among others) makes such a set. Try calling the many shops on the sponsors page and after you talk to ALL of them, make an INFORMED decision with the vender of your liking!

not to but in on this thread. . BUT - I have the HTT 66/14 (really old one), and for daily driving it is a bit slow... So I though of switching to a 62/14...



On the other hand, I did not know the towing twins were both s300 variants. SOOO... could I just add my stock turbo on top of my 66mm (put a 16cm housing though on it) ?? - make like a cheap towing twins setup?

 

[DCreed]

BD twins are both s300s. IIRC industrial uses a s300/K31 and Poole s300/400 or HX40/HT3B sets. you'll need to consult vendors or do some research to devolope a set-up that'll perform well on YOUR truck the way YOU'LL use it.
if your stocker was a HY9 then its prolly too small and AT LEAST would need an external gate added. but some folks do run that set up. If you want to keep 600+hp cool the s300/400, HX40/HT3b, s300/K31 twins will work much better.