Dyno'd today, thanks Locobob.
 

Hit the dyno again today. After installing the new to me, ported plenum and IH, done by Locobob, I'm up 44 hp.

Re: Dyno'd today, thanks Locobob.
 

Congrats....Nice gain. What were the numbers?

Re: Dyno'd today, thanks Locobob.
 

Are you serious? Porting the plenum and IH gave you a NET 44 hp? You gained over 10% of the overall HP of the LT5? At the wheels? You ran it on the dyno immediately before and after this mod?

Re: Dyno'd today, thanks Locobob.
 

I was 353 at the wheels before, actually 2 years ago. Early this winter, bought a ported plenum and injector housing form Locobob, also did injectors and coils. Today, dyno'd at 397 rwhp.

Did a couple of other runs.

When I bought the car with a K&N, dyno'd at 311.
Did headers and exhaust, 353.
Ported P & IH, 397.
Key off today, 247, exactly 150 hp loss.
Accordion pulled, get this, 386, lost power.
Next is a visit to Pete.

Steve

PS, next on the dyno was a 1,000 hp Mustang.

Re: Dyno'd today, thanks Locobob.
 

Couple of years in between, but that was the major mod, other than injectors that were not giving me trouble. It all started with doing injectors, next thing you know i'm investing in a powder coated plenum and IH.

Re: Dyno'd today, thanks Locobob.
 

Nice numbers. Whole new world isn't it? Did you go with OBX all the way back? Also, just curious if the numbers were SAE or STD?
Congrats on the new power.

Re: Dyno'd today, thanks Locobob.
 

That's an impressive gain. Would you say the SOTP gain was greater when you added headers/exhaust or when you added the ported plenum/IH?

Re: Dyno'd today, thanks Locobob.
 

OBX ceramic coated headers and OBX exhaust.
SAE adjusted, but it was a perfect day and there was no correction. -Steve

Re: Dyno'd today, thanks Locobob.
 

Hard to say on SOTP, it was almost 6 months in between drives with the new top end parts. Also should add, Marc chip done with exhaust, and redone for the porting. Marc may have gotten a little aggresive, we think we saw some detonation at between 6k and 6500. -Steve

Re: Dyno'd today, thanks Locobob.
 

Steve
You're up early?
Doug

Re: Dyno'd today, thanks Locobob.
 

I'd be surprised about that. Did you run a WB O2 with the runs? Detonation usually happens somewhere right around torque peak. Likely why u see a bit of a sag in the torque curve at the rpm before it continues further up.

Re: Dyno'd today, thanks Locobob.
 

We had some fluttering in the curve at top end. He suspected detonation. A/F was about 12.5 when it happened. Didn't feel it, just see it on the curve.

Re: Dyno'd today, thanks Locobob.
 

You will usually see "fluttering" especially at top end. There's fluctuations that could have something to do w traction on the roller etc. There's also "smoothing" which is part of the software. I've bumped my timing up to 34d+ at top end and motor did not detonate, it just dropped in power. I'm pretty sure Marc's cal is more conservative than that. 12.5 is a bit fat IMO, but that will also be dependent on whether the overall tune is rich or lean. I'd also want to see what plugs look like.

Re: Dyno'd today, thanks Locobob.
 

Thanks Dom, eases my mind to think I'm not detonating at 6 grand.

Re: Dyno'd today, thanks Locobob.
 

Thanks. If you want to meet up in epping one day let me know.

Re: Dyno'd today, thanks Locobob.
 

Steve,

Obviously you pull a few plugs and just make sure there's no aluminum pitting in the ceramic.

Re: Dyno'd today, thanks Locobob.
 

Where in MA are you?

Re: Dyno'd today, thanks Locobob.
 

Dom, the plugs look to have sort of a grey color to them. The two I pulled have gone from the .0050 (at Marc's recomendation) to .0060. Iridium plugs.

Re: Dyno'd today, thanks Locobob.
 

South coast. About 1/2 hour from the cape.

Re: Dyno'd today, thanks Locobob.
 

Headed to Worcester next weekend.
Epping to watch the races, or Epping to race? -Steve

Re: Dyno'd today, thanks Locobob.
 

I could certainly be tempted to make a few passes if you're interested. I've only been a couple of times. Once they cut it back to 1/8 mile due to wind and the last time it was 42' and I reinvented the sit N spin.

Re: Dyno'd today, thanks Locobob.
 

Never done the quarter mile. I think Wednesday is run what you brung.

Re: Dyno'd today, thanks Locobob.
 

I'm much more of a back roads guy myself. I believe you're correct about wednesdays. The middle of the week could be a little tough for me as it's an hour and a half each way without traffic. Although, I could always take the day off as opposed to driving up after. Let me know what you're thinking.

Re: Dyno'd today, thanks Locobob.
 

I wasn't thinking anything until you brought it up. My schedule is easy, own my own business. Let me know if it's worth the trip up, and the day off.

Re: Dyno'd today, thanks Locobob.
 

Ok. Good to know. Looks like wednesdays and fridays are pretty much the same for them. I'll shoot you a pm in a week or so. Definitely worth the trip.

Re: Dyno'd today, thanks Locobob.
 

That's excellent Steve, glad you are happy with my work. Headers, exhaust and intake porting really work well together - each compliments the other and you'll only see the full potential of each when combined. From my dyno experience a little knock retard in the 4K range is pretty normal and hard to eliminate, if it doesn't recover quickly or comes on in the higher rpms then I'd work on your tuning some more. 12.5 should be plenty safe for A/F.

Re: Dyno'd today, thanks Locobob.
 

At some point, hopefully in the near future, will be head work and a custom tune.
Any headway on the set I sent you Robert?

Re: Dyno'd today, thanks Locobob.
 

Zero.... fighting like mad to get my interior project wrapped up so I can salvage a little bit of the driving season. I blame "while I'm there" syndrome lol

Re: Dyno'd today, thanks Locobob.
 

Understand the while I'm in there" problem.
I started out doing injectors, but while I'm in there, lets do coils and wires and starter, might as well buy a ported plenum and injector housing while I'm in there. Might as well have them powder coated too.

Re: Dyno'd today, thanks Locobob.
 

Know it all too well Robert.

Re: Dyno'd today, thanks Locobob.
 

More mods, another dyno run today.

Re: Dyno'd today, thanks Locobob.
 

So? How did it go?!

Re: Dyno'd today, thanks Locobob.
 

Cams, ported heads, open up the plenum and IH more, 15# flywheel, lite weights pulleys.
451 rwhp, 403 rwtq.
520 hp figuring 15% loss.
Running a little lean, hit a peak of about 13.9 a/f.

Re: Dyno'd today, thanks Locobob.
 

Definitely fatten it up. What was the correction factor used for the dyno?
SAE, Standard, Actual? Dynojet or Mustang?

Re: Dyno'd today, thanks Locobob.
 

Dom, it was SAE corrected.
Land and Sea dyno that he tells me runs very close numbers to the Dynojet.
I think when he corrected to Standard I was about 478 rwhp, or 562 hp. I like those numbers. Next time I'm going to ask him to do it in first, just for the fun of it.

Re: Dyno'd today, thanks Locobob.
 

When I talked to Pete about the 13.9, he custom tuned with a bung on the headers, the dyno guy used a sniffer in the end of the tail pipe. So there might be some discrepancy there.

Re: Dyno'd today, thanks Locobob.
 

For mostly the same mods, my #1727 car puts down 434rwhp, 366 rwtq on the dynojet. And a consistent 400hp on Mustang dyno. I'd say you did pretty good.
...must be those new Fog lights giving you the extra ponies...lol

Re: Dyno'd today, thanks Locobob.
 

George, do you have cams?
The fog lights are great, working on the headlights.

Re: Dyno'd today, thanks Locobob.
 

Hi Steve
Those are good numbers now imagine if the cams were not split intakes and a little bigger like my intakes :)

About the sniffer on the tailpipe if you have small exhaust leaks it will cause the tail pipe sniffer to show lean.

We do need to make sure all is good.

Glad to hear you are enjoying her.

Pete

Re: Dyno'd today, thanks Locobob.
 

I'm loving it, the wife, not so much.
How do we make sure all is good.