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by **studlybilly** » Tue Jan 29, 2008 12:33 pm

I'm considering a 4bt build and have a few questions regarding the 14mm head upgrade. My setup would consist of the 14mm head and 45psi elec. fuel pump. Would this setup allow me to make 500hp?

by **cummins king** » Tue Jan 29, 2008 5:20 pm

i dont know thats alot of power for a 4 cly, theres not many 6cly over 500hp, you would need a big set of twin turbos, large injectors, the stuff about the pump is unproven, your going to need a seal that noby can find and we dont know about the reliablilty yet, your far better off with a p pump, i know a guy not personal but he has a lder bronco with a four cly cummins p pumped and it only has 400hp and its really done up
so good luck

by **KTA** » Wed Jan 30, 2008 6:18 am

The 14mm heads I have are for a 6cyl, I don't know of any for a 4cyl. I would suspect 400hp on a 4cyl would be more reasonable with a 14mm on a 4bt.

by **studlybilly** » Wed Jan 30, 2008 9:35 am

KTA wrote:The 14mm heads I have are for a 6cyl, I don't know of any for a 4cyl. I would suspect 400hp on a 4cyl would be more reasonable with a 14mm on a 4bt.

Wouldn't the 4bt VE pump be the same design given the 4bt is a direct descendant of the 6bt? Is there any way to run a bigger head or anything? Sourcing a P-pump for this motor is tough and pricey, the motor was free in the first place though.

by **studlybilly** » Wed Jan 30, 2008 9:41 am

cummins king wrote:i dont know thats alot of power for a 4 cly, theres not many 6cly over 500hp, you would need a big set of twin turbos, large injectors, the stuff about the pump is unproven, your going to need a seal that noby can find and we dont know about the reliablilty yet, your far better off with a p pump, i know a guy not personal but he has a lder bronco with a four cly cummins p pumped and it only has 400hp and its really done up
so good luck

Engine would be balanced, studded and the turbo configuration would be a twin. The H1C would be feeding a TV8101 (108mm compressor wheel lol). So basically I do want a P-pump so I can crank the ever living snot out of this engine.

by **Begle1** » Wed Jan 30, 2008 10:25 am

There were a few European websites floating around that had 14 mm heads for 4-cylinder VW applications. Right? Don't I recall something like that?

by **studlybilly** » Wed Jan 30, 2008 11:54 am

Well let me ask this then, from what I have vaguely been told the VE pump die's from fuel starvation since it can't cool itself? Wouldn't a high flow pump to feed the injection pump eliminate this problem? Or maybe route the fuel lines through a fluid cooler and pack dry ice around it?

by **burnt_servo** » Wed Jan 30, 2008 12:10 pm

what do you intend on doing with the 4bt , and why can't you use a 6 bt ?

your looking at investing a pile of money here to reinvent the wheel and create a unreliable lump of iron .
do you have the 10 to 12 grand to invest into this motor to do things properly ?
4bt parts are pricey compared to 6bt .

by **burnt_servo** » Wed Jan 30, 2008 12:14 pm

Begle1 wrote:There were a few European websites floating around that had 14 mm heads for 4-cylinder VW applications. Right? Don't I recall something like that?

14mm ..... really ....

off to go find a set for my vw

by **studlybilly** » Wed Jan 30, 2008 12:45 pm

burnt_servo wrote:what do you intend on doing with the 4bt , and why can't you use a 6 bt ?

weight, and this 4bt would be going in my durang-ho for offroad application(s).

your looking at investing a pile of money here to reinvent the wheel and create a unreliable lump of iron .
do you have the 10 to 12 grand to invest into this motor to do things properly ?
4bt parts are pricey compared to 6bt .

I don't see where everyone gets the 10k benchmark price? Maybe I just have connections but my build thus far is as follows:

ARP Stud kit - $300
Balance rotating assembly and o-ring head - $350
14mm pump head - $257
Injector nozzles custom cut - $300 (guessing here, haven't got a quotte)
I'd really like to look into fire ringing
Girdle - $180
TV8101 - already have

What am I missing that is so expensive and significant? Either way I'm not at a loss, I already have a 503 BBC on the cutting board at a machine shop. Which I intended on running the TV8101 on, I just have a couple 4bt's and have always been intrigued with diesels.

Another thing is I don't really grasp the application of power that the diesel gives. Along with the fact that torque is the main goal. So I tend to base my figures on HP numbers comparable to gassers since that's what I know as far as seat of pants feel. I don't how 400hp/800lbft+ @ 2500 RPM's compare's to a gasser with 800hp @ 5000 rpms.

by **burnt_servo** » Wed Jan 30, 2008 1:00 pm

so basicly you need a reliable engine first , since it's going to be used offroad ......

get the engine installed and running first , STOCK ..... then drive it and work the bugs out ..... THEN modify the engine .

even at 200 hp levels , your going to have difficulty keeping the dakota's running gear in one piece , unless your carefull .

by **studlybilly** » Wed Jan 30, 2008 1:04 pm

burnt_servo wrote:even at 200 hp levels , your going to have difficulty keeping the dakota's running gear in one piece , unless your carefull .

I promise you this running gear isn't going anywhere, my truck/build consists of

Built TH475 transmission
Ford NP205 floater t/case, 1410 u-joints
Rockwell 2.5ton toploaders w/ 2" chromoly shafts
currently 53" michelins on stazwork rims, but soon to be 57"+ tractors

**EDIT** and no, I'm not careful with my hooptie, I beat it like it owes me money.

by **RumbleFish** » Wed Jan 30, 2008 1:26 pm

pics?

by **studlybilly** » Wed Jan 30, 2008 1:32 pm

by **oldestof11** » Wed Jan 30, 2008 1:57 pm

Yep, bubba, that some huntin' rig rite thar! :lol:

J/K, VERY NICE!

Now, what is a TH475? Is it bigger than the TH400?

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