BigBully

I had II build my pump into a Dragon Fly, and built me dual feed Dragon Flow injectors, I also done a compound setup with my HTB2-62 (Wasted at 25psi) and an II S400. Timing is dead nuts on 18*. This thing smokes like a pig, No bottom end, High EGTs and only getting about 55psi boost. It pulled way harder before and would break the tires loose in second and wont do that anymore. WTH is wrong with this thing?

Mike D

Timing seems a bit low and you should probably turn the wastegate up to around 30psi assuming you've taken care of the HG.

BigBully

II set the timing at 18* and thats where they say its supposed to be, It has a 20 over Marine gasket and arp head studs. So you think the timing and wg should be higher?

green puller

55 psi was enough to blow my marine gsk at 4300 rpm but held fine at lower rpms so you should be able to raise the boost a bit but keep an eye on rpm

12valvesmoke

if you roll into the throttle instead of mashing it it helps too. you prolly have so much fuel runnin thru your turbos now they cant spool fast enough for your liking. and twins are going to hit as hard as a good single either. i would turn up the boost tho seems kinda low for those twins.

Jared

BigBully

Ok I will raise the WG psi tomorrow and see what happins. Thank you.

Mike D

I would start with raising the boost pressure first and then move to the timing.

12valvesmoke

and if the timing is higher it moves the power curve up higher in the rpm's too. my brother's is set at 18 and he said he misses the low end that mine has. but you need the timing your rig sounds like its getting pretty high end you cant it expect it to do everything. and do you have more power on the top in once your turbo is spooled and the smoke clears a little?

BigBully

It has more top end yes but still dont have the power I think it should have, I spent alot of coin on this thing and its not much if any better then what I had before.

BigBully

Fuel pressure is at about 30 to 32 psi, Do i need to up it more?

Tate

Have you checked what DV's they put in there? I got a 175 turned into a Dragon Fly. I haven't confirmed it yet, but I have a sneaking suspicion that its just big DV's and a GSK. Mine is still sitting in the box that it came in, no idea how it compares to my 215's.

BigBully

Ya they installed my PDR DVs and it acts alot like it did before I had them modify it. Before it would run like poo with the PDR DVs in there but I figured it was because not enough fuel pressure but I have a 150 Air Dog now and it still does the same thing.

BigBully

Ok have not had much time to mess with this thing but I am gonna up the timing, ,Another guy at II told me to raise the timing to 24* Does this sound ok to you guys? I just checked it and its still at 18* so no slippage.

HOHN

Wow, you really do hate headgaskets, eh?

BigBully

No I dont hate them but I want this truck to run VERY good, So what do you reccomend? I have not changed the timing yet, I wanted to see what you guys had to say. It is studded and O-ringed but Im still leary of it.