Competition How much fuel to spool ht3b?

[AKron]

Thinking about getting twins soon. How much fuel would be needed to run an ht3b with a 32cm housing on it? What would be a good primary to go with it? Im thinking an hx40. The truck is not a dd, and im not worried about lag. Goal is around 600-650hp

 

[TCluff]

Thinking about getting twins soon. How much fuel would be needed to run an ht3b with a 32cm housing on it? What would be a good primary to go with it? Im thinking an hx40. The truck is not a dd, and im not worried about lag. Goal is around 600-650hp

, find a 26 cm housing for the 3b and use the hx-35 stocker on top, modded plate and 370s with some pump timing, mls gasket and studs, should give you around 55psi of safe boost and decent egts, but a little smokey on the bottom... should be inexpensive... .

 

[Reb.B]

3b's are too old. a 32 housing is way too big. Need to big a small and big Switzer "S" series turbo. Better running all around.

 

[DCreed]

I run a 40/16-3B/32 on a 24 valve over 500hp and it works just fine!! was cheap to make too. yes the s300s are better but @ 3 times the cost, I like mine, thank you.

 

[Jim Fulmer]

I just build a PDR 40/3B set of Twins out of parts that I had to find out the 3B was bad, lasted about 20 miles..... it was very old! Called up Industrial and ordered another 3B/26 to replace it..... too cheap to pass up.



This setup works very well on my truck, spools quick and cools well, alot quieter than I expected, should have some good R&D by next week!



Jim

 

[DCreed]

Jim, how much fuel you pushing to those? what boost do you run at(max)?

 

[Jim Fulmer]

I don't really know the amount of fuel in cc's but a beanch tweaked 215... nothing special (small DV and holders) and 370's for injectors. Max boost was 60 and 32 from the 3B.



Don't know on power as the motor has lost too much compression, before that power was 600 using that combo and my Bullet.



Jim

 

[DCreed]

I've heard 35psi is the limit for a 3B. if so , why not push the 40 up to 35 and keep the 3b down under 30?

 

[Jim Fulmer]

I've heard 35psi is the limit for a 3B. if so , why not push the 40 up to 35 and keep the 3b down under 30?

35 is not much for a turbo that size! To do that to the 3B you would have to run a bigger housing as it is not gated, now I could wrench down on the gate and take some of that energy away to slow the 3B down at the cost of total boost going up.



What many of you may not know is I have personally seen a 40/3B combo make 756 hp on #2 at 65-70 psi, why would I beat on it when it works fine, now after it is sold if the buyer wants to beat on it that is there deal.



Jim

 

[TCluff]

35 is not much for a turbo that size! To do that to the 3B you would have to run a bigger housing as it is not gated, now I could wrench down on the gate and take some of that energy away to slow the 3B down at the cost of total boost going up.



What many of you may not know is I have personally seen a 40/3B combo make 756 hp on #2 at 65-70 psi, why would I beat on it when it works fine, now after it is sold if the buyer wants to beat on it that is there deal.



Jim

stealing the thread a little but, i run the pdr 40-16 3b-26 on the 03 common rail and was going to push it over 75 psi 63lpm injectors with dual pumps, maybe you know a few pointers to do or to look out for stock cam, f-1 springs, 4200 rpm the cylinder head is unported on the intake and port matched minor polish on the exhaust.

 

[Jim Fulmer]

The main thing is we really don't know what the top turbo is actually doing, or lets say I don't cause the Map is out of the window and not really applicable.



I know that combo has been pushed hard before I just don't see the need in it right now, what I will do is start looking at what boost it makes, total and 3B then start checking drive pressures at different levels.



Keep in mind that everything is different with a C/R and they seem to do alot better than a 12V.



Jim

 

[TCluff]

The main thing is we really don't know what the top turbo is actually doing, or lets say I don't cause the Map is out of the window and not really applicable.



I know that combo has been pushed hard before I just don't see the need in it right now, what I will do is start looking at what boost it makes, total and 3B then start checking drive pressures at different levels.



Keep in mind that everything is different with a C/R and they seem to do alot better than a 12V.



Jim

thanks, i want to throw in a little more headwork and push it into the 800 territory on diesel only without buying another set of twins

 

[4 wheelssmoking]

I have the 40/3b setup on my truck and it performs very well. it will push past 70 psi if too much fuel is called for down low. I have made 625/1200+ on #2 only. Iam afraid that N2O would be a bit much for this setup. This setup spools very well, better than the 40 alone.

 

[SHughes]

How do you measure the size of the exhaust housing? When limited information is available on the turbo that is in the mail.



I have an HT3B being shipped to me but I know very little about the size of the exhaust housing, and this may be the determining factor on which truck I put it on.

 

[DCreed]

How do you measure the size of the exhaust housing? When limited information is available on the turbo that is in the mail.



I have an HT3B being shipped to me but I know very little about the size of the exhaust housing, and this may be the determining factor on which truck I put it on.

should be stamped inside the exhaust housings inlet side