clutch1

Bobcat makes a good point, what took the little 35 to do at say 10psi the larger turbo will do at 5psi. the turbo will change a little after maybe two weeks of driving egts will slow down, cool down will be lower and the boost will be easier had.

bridleman

I spoke with Dennis at HTT and as of right now I'm gonna pressurize the system and put a oil press. gauge on to monitor the drive press. in relation to boost psi Problem is I won't be able to press the system until thurs but as soon as I get some info back on that I'll be able to narrow things down, Dennis said if everything checks out ok then we'll start changing the configuration of the turbo like different wheel or housing or even compressor, he felt that maybe I'm fueling to hard and bogging down that big 71 wheel? Any thoughts? Thanks guys.

clutch1

by bogging down did he mean overall to much fuel or like flooding the turbo at spool up? what is he suggesting to go bigger or smaller.

J Lent

I have more fuel than you do & don't have any problems at all. I'd throw that idea out & start checking for boost leaks. I wouldn't change turbos....I've tried every turbo that HT has to offer in the 62,64 compressor sizes & you have the best charger of the bunch. Just check for boost leaks & watch your fuel pressure to make sure that you aren't running the vp44 dry. If you are running out of fuel....injectors can't flow what is not there.

bridleman

clutch1 Yes he meant flooding the turbo with to much fuel and he thinks going with the 65 wheel might be better.

Jlent I agree you do have more fuel and after hearing what you had to say about this turbo and a couple other guys it made my mind up to go with this one . I'm currently running 20 psi at idle and 10-13at WOT

That all being said, like I stated earlier I turned the wastegate up and nothing changed so..........I decided to turn it back down and I went and checked all the hoses and they were all tight, so I got in the truck headed down the road and and eased into and BANG!!!! It woke up and took off like a raped ape So what the heck just happened? I don't think I did anything that would constitute this kind of a change? My boost was running at 35psi max does that seem normal. I have no clue whats going on!!

HOHN

Well, if it's working well now I'd just go with it. You don't want to disturb the Force on this one, as there some kind of karma or something going on with your truck.

35psi sounds right to me with your fueling combo and that big turbine side and 62mm compressor.

JH

bridleman

yeah I'm afraid to even look at it in the morning it might get mad at me and decide to blow a head gasket or something. This truck has a little bit of Christine in it I think .

bridleman

Well I put the oil psi gauge on the truck like Dennis at HTT said and from what he told me it seems that I have to much fuel he said 1 to 1 ratio I'm running 45-50psi at the exhaust manifold and only 37-38psi of boost any thoughts on this is it possible that I have to much fuel or bad turbo? Also a side question any guess what I might be making RWHP??

HOHN

I'm with the guys who say boost leak.

Have you pressure checked things yet?

JH

Ph4tty

Nobody thinks its the altitude is effecting him. I believe he's a few thousand feet higher than Mr j lent.

bridleman

Ph4tty would elevation play this much into it?? I know it's a little off course for the problem I 'm having but any ideas on #'S I should be making now?

RowJ

Wrong. Bigger housing will produce less boost at cruise than a stock turbo.

Also, at 4,000', you will run 8-9 psi less than sea level. I had a KSB-1 and when I went from here to Denver I would slowly loose 10 psi on the top end as I gained altitude! And I got a lot more smoke at low boost readings... it was much harder to control in city traffic.

Did not see where anyone asked.... Are you dirving it with more rpm in each gear. I would suggest not shifting till you reach 2500 rpm in each gear. It's one of the changes required with heavy fuel... if you are not already?? JMO.

RJ

J Lent

Good point! I do most of my towing at 2200-2700ft. This is a factor that should be taken into the equation. I was running 55psi boost with this turbo before I blew my head gasket.

RonA

I changed from a ss16cm housing to a ss13cm. I was kind of suprised with the results. It spools a bit better on the bottom, runs about 50 degrees hotter at 60mph cruise, and runs about 100 degrees hotter in the rolling hills.

bridleman

I'm thinking HTT is gonna give me a 64/65/13ss to try and see if it changes anything, is anyone running this and what are your thoughts on how it might work for me I'm a little worried that it might be to big? But I'm willing to try anything, at this point.