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Guessing Game: Dyno Time

R

roflcopter

New member
Joined
Sep 30, 2013
Location
Lower Alabama
Alright guys, I'm just trying to start a bit of discussion here... Yes I know it's been gone over before but there's always a lot of if's and not a lot of real data behind it...

I have my 245 B230F+T build coming to a completion(at least for it's current form) and finally got it on the dyno this past weekend.

14700816_1812487062325392_5739751329150584946_o.jpg


The numbers I got are useless though since the AW70 decided to give up the ghost a few days prior and I couldn't get a 3rd gear pull without it slipping once I got onto boost. The number we saw before it dropped off due to slippage was 189hp(at about 4-5psi) but who knows how realistic that number is...

I have an AW71 on the way but I figured it'd be fun to talk about how much power everybody thinks it'll put down once that goes in.

K-block B230F
9.8:1 NA Pistons
13MM rods
T04E 50 Trim with .68 turbine housing
3" open downpipe
Giant Intercooler
685cc Injectors
Megasquirt

Currently running 21psi.

Thoughts?
 
My compression ratio is 9.8:1. Since this is K-block without squirters, etc I am not super worried about blowing this motor up... I figured I'd see how far it can be pushed.

At 21psi I do not seem to be having any issues other than with the transmission, I plan on upping it a bit more. Does anyone have any good numbers for dynamic compression calculations on these motors? I hadn't found any but it would be interesting to see what kind of cylinder pressures I should be running.
 
And most Important question.... What kind of dyno? Mustang vs dynojet might show 20-30whp difference. At the numbers you are at.

Just because of the M cam I will say 270whp / 325trq, who knows how hard you are pushing the timing map but you are running Semi proper sized turbo moving more air at higher psi. The 90+ and M cam will be holding you back the most.
 
thelostartof said:
And most Important question.... What kind of dyno? Mustang vs dynojet might show 20-30whp difference. At the numbers you are at.

Just because of the M cam I will say 270whp / 325trq, who knows how hard you are pushing the timing map but you are running Semi proper sized turbo moving more air at higher psi. The 90+ and M cam will be holding you back the most.
Click to expand...

It was on a Dynocom this last time, will probably be on a Dynojet next time.

If I can get in the 270-275whp range at that boost level I'll be pretty happy. I'm not running much timing up top yet(9-10* btdc at 21psi) since I haven't had proper dyno time to really dig into tuning it properly. The turbo should be properly sized for making 340ish at the wheels once I crank the boost up, definitely won't be the bottleneck unless I went over 30psi.

The 90+ is actually ported pretty well, we hogged it out and refaced the flange on my buddy's mill and got everything lined up for the t3.

How much of a difference am I going to find if I go to a different cam? I've been considering it but haven't done it due to trying to sort everything else out still.
 
Cam should be 20-30whp depending on boost and what setup you have before and after. Going from a non turbo cam to one with more lift that is setup to work properly with boost you can net good gains.

When I ditched my 90+ for a poorly made header with a real collector I gained 30whp.
 
Holy crap... those are some mad gainz.

I'll definitely look into those options down the road, currently if I can make in the neighborhood of 320whp with just a bit more boost I'll be happy. The bottom end and trans probably won't be able to take much more than that anyways.
 
roflcopter said:
Holy crap... those are some mad gainz.

I'll definitely look into those options down the road, currently if I can make in the neighborhood of 320whp with just a bit more boost I'll be happy. The bottom end and trans probably won't be able to take much more than that anyways.
Click to expand...

With your current setup I do not see you being all that close to 320whp even with more boost, @ least as long as the dyno operator isn't messing with the numbers, especially with an auto.
 
I wasn't thinking about the cam when I made my guesstimate. On a similar turbo I wasn't gaining much more power by cranking up the boost past ~20ish, on a 90+ with a smaller 0.48 hotside. BUT i was on e85 and had an IPD cam in it. 299whp was the most I saw thru the auto at 21, power was dropping off pretty hard in higher rpms.
 
turbotankshane said:
I wasn't thinking about the cam when I made my guesstimate. On a similar turbo I wasn't gaining much more power by cranking up the boost past ~20ish, on a 90+ with a smaller 0.48 hotside. BUT i was on e85 and had an IPD cam in it. 299whp was the most I saw thru the auto at 21, power was dropping off pretty hard in higher rpms.
Click to expand...

Do you have a picture of that dyno graph?

With my holset @ 20psi on LH with the v15t cam (same as ipd) I was still making more power @6300+ rpm when the guy lifted. On that dyno I did 301whp on pump gas.
 
I'll definitely do some experimenting when I get it back on the rollers and see where exactly the restriction lies... I know the turbo will be fine for more boost than I plan on running, and the intercooler is doing it's job perfectly(haven't seen an IAT over 100*F even at 21psi) so cam/head/manifold are really the only other places.

The guys at Emerald Coast are doing well! Definitely expanding and gaining more of a following, it's cool to see a shop that really is the whole package and a great group of guys.
 
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