Yeah, the 7's are just a tad too much stick for a 66 class turbo. Jetty did like 610 using the old school B-1 turbo. It had a 64mm compressor. His injector was a 6.4-6.5 size.

And your right again, the 7's are bettter suited to nitrous if you have single turbo. Jet ran the 6+ and the 8 both with nitrous and ended up lower on the 8's with Diesel, but much higher using nitrous!

The 7's that were dynoed in this test were not optimal for his turbo, but not a terrible match either.

 

GB5.9, when you dyno again, be sure to redyno your current setup as a baseline to ensure certain variables have not changed like barrometer, temp, dyno temp, #2 in your truck, etc etc. So be sure if you can to run once with your current setup before changing those cross overs to see if you get consistent numbers.

 

TJ, good to see some nice numbers out of your truck, the way it's been pullin I knew the power was there. Nice test too, good reading, and thanks to all for keeping this thread objective and helpful, instead of negative and useless. TJ, when you going back down, I wanna see if I can break 400.

 

that's one heck of a comparison. Don, what kinda hp difference is there between the Mach 7's and 8's on just diesel?

 

On the F1 website it use to say that 8's will produce less on #2 the 7's but more on NX as the 8's are basically a strictly competition NX injector.

 

An older FASS 95 with 1/2" line all the way to the IP, no stock filter housing or other restriction...my biggest restriction is the little hole in the fitting that threads right into the VP44, I see 12-13psi all day, and when the motor loads up and starts pulling fuel i see no less than 10...MAYBE 9 psi.

I have already informed dzlfarmboy that I will need to do this test with the honed tubes, then swap and run again to see the change in power for those particular conditions that day. If he allows me to use a few extra minutes I will throw SW3 in the ECM once and try it because some claim higher numbers with lower settings on the smarty

Saturday all the way over in Chestertown...its a haul but they will have the dyno, and there is the pull that night.

 

Don, is there any kind of backorder/hold up on your sportsman valve springs? Will your vendors have them in stock? I'm getting worried about the amount of valve float I am seeing now and want to get it taken care of asap.

Until then, the boost elbow gets turned down to about 45psi

 

I would think that would be a wise investment for the rpm's you are wanting to run pulling the sled.

 

here is my truck on the dyno with Mach 7's...you can see its kinda putting the fire out down low with all that smoke, but when it lights...IT LIGHTS, and the silver bullet cleans it up

http://www.youtube.com/watch?v=BUiI7IthtlE

 

What are your EGT's like? That looks great man, seems like a very good running combo! I'm kinda like you on the injector thing whatever you want to buy go for it, it isn't worth all the arguing some people do IMO.

 

at 55psi, its about 1450 max, with the boost turned down to 42psi, it gets over 1500, and may get to 1600, but I honestly haven't tried it. I know going from 55 down to 42psi lost me nearly 50hp on the dyno.

 

How did you test that..... doesn't sound quite right?? 55 psi on that turbo should be a lot of unusable expansion pressure..... no?

Nice comparison on the injectors!

RJ

 

We ran it with the adjustable boost elbow turned out, and then we tighten it back up again.

 

last week i did 571...this week we were gonna run some tests so to get a baseline we ran it before making any changes and it was down to 523, turned the boost back up and did 566. so 43hp on back to back runs with the only change being closing up the adjustable elbow

 

Please do yourself a favor and get an Aurora 5000. I bet your dyno numbers go up by 50-60 horsepower.

**(I just seen your post on the other website......priorities, priorities)