Marcin, your about 20 minutes from my hometown that I may be moving back to in a month or so...LaGrange. Sweet, if/when I come back that way (in the military now), we'll have to hook up.

Yeah, I know something maybe up...I'm PRETTY sure it has to be my transmission slipping cause it is going out.

If its not, then like OneFlyin said, will have to keep tuning..adn play with my timing some. Guess I'll read up and figure out whch way/how much I need to adjust.

Thanks for info OneFlyin, really helpful..I may PM you here in the future if you dont mind!

 

It doesn't seem to me your torque is that low.. You have an A4 which eats up, if you have a stall TC, even more...

XXsaint... WOW!!!!

I dynoed 393rwhp with a 383 tame cam, afr heads and a supercharger 5psi!!!!! I was dissapionted, but... who knows.. Now I dyno 600 with just 10psi boost.. so.. it depends on many factors and 2 engines are not alike.. for what I have seen here.. those are good numbers.

 

My numbers are with homeported heads. Cant wai tto get dyno numbers since Lloyd's heads and my LT's. I should have it up and running in a week or so.

 

looks low for a heads cam car

 

Oh come on guys.. not all lt1s will hit the 400rwhp mark with heads and cam... not even the ls1 community is doing that, that easy...

 

thats right..they are just hitting 400+ rwhp with just bolt ons and cam

 

My friend has a Stage 2 CNC heads LS1 with 220/220/112 cam and near 600 lift, and makes 406rwhp. That is a medium cam on an LS1, but it just goes to show....

Another guy I know is putting 380 with his LS1 with a LS1 HOTcam. (Stock heads and Yes, there is an LS1 HOTcam) So, thats just some perspective for you.

 

Well lets see.. a stock head and cam camaro with all possible bolt ons except headers, including under drive pulleys is making 322 through a stick...

A p&p headed ls1 eith 218/218 cam header shorties making 302rwhp through an auto...

a z06 making 340 with headers

a stock c5 making 269 with NOTHING

a LINGENFELTER 382 with manguson supercharger and 5psi boost making 350rwhp... should I continue??? those HP figures you see around there are not the average joe HP from the cars...

full bolt on camaros hit 245rwhp through an auto...

and a few other stuff.. could be the heat or humidity..

 

Where did these numbers come from?
All of those are soooo low if they were my car I'd hang myself!
Were these on a dynojet?

 

Yes, on a dynojet seen by me!

 

73 RWHP from cam/heads is nothing to sneeze at, especailly if you are using the same dyno. How does it feel, stronger? Spark plugs/wires/opti in good condition ?

 

Alex,

Your numbers do seem a bit low, but that could also be because of your slipping tranny. I have the same cam as you with home ported heads(flow numbers in sig) and I put down 380 rwhp @ 6400. My numbers through a stock motor were 260 rwhp. So I gained 120 from the heads and cam. My numbers were through an auto with a Vig 3600. I dont think I had enough spring pressure on mine, and that problem will be changed this week. Mt LT4 extreme duty timing chain came apart and that put alot of metal through the motor. The motor will be freshened up this week and I might dyno it again in the near future to see if the power changes any with new springs(985's), comp R lifters, and a fresh bottom end. BTW, my A/F was right at 13.0:1 if you were wondering.

Brian

 

I'll say those are some really low #'s. Here were the #'s of a few other cars that ran the day I ran mine:

99 C5 299rwhp

02 Z06 362rwhp

O3 Cobra 372rwhp

All of them were completely stock and this was on a Dynojet. There were a bunch of other LS1's there, don't remember all their #'s but they were pretty on target. After all the mods I've done and then watching that damn stock Cobra run I was like

 

Gotta love the good 'ol dynojets. They consistently give inflated numbers. That's why the new standard should be the MD because it not only gives consistent numbers (as does the dynojet), but it gives REAL numbers. A dynojet might be great for tuning (for most cars w/ the exception of turbos who need the load of a MD or similar dyno to get full boost), but for anything realistic it's not so great (trap speeds, etc). FWIW, a stock z06 (02+)will put 330-340 on a MD. 15% off of 405 is 339.xx.

I've seen dynojets give HUGE numbers a million times. That's why so many people think the LS1's, 03 cobras, and on and on are "underrated" from the factory. They probably aren't underrated at all...what's going on is the dynojets are INFLATING the rear wheel numbers and then when people calculate flywheel hp, the numbers are well above what the manufacturer claimed.

Just look at what a stock 03 cobra traps...usually around 110 (numerous magazines have tested and they consistently get right around that so it's probably pretty accurate). According to your numbers, an 03 cobra (maybe 300 lbs heavier than a vette which is pretty negligible) will trap HIGHER than the z06 (and it's a pretty even comparison since both have t56's and IRS's). But I have NEVER seen that happen in reality. Stock 02+ z06's always trap at least 113 sometimes up to 116 while stock 03 cobras are usually between 108 and 110.

Just my 2 cents...

 

300 lb difference between an O6 and a 03 Cobra? It's actually 549lbs:

03 ZO6

03 Cobra

Besides that huge weight advantage the O6 has over the Cobra it's platform is light years better than the Mustangs 25 year old chassis. Yes, they both use IRS and the Cobra uses the T56 mounted in the traditional manner to the motor but the ZO6 uses an M12 rear mounted transaxle which offers much better weight distribution to the rear of the car helping it launch much better. I wouldn't doubt the 03 Cobra makes more power than the O6, it just doesn't perform as well on the drag strip due to it's much heavier weight and way older chassis design which are reflected by it's lower times and trap numbers. Maybe the dynojets run a little high or the MD is a little on the low side, I don't know, but these were the #'s I saw from each of these cars that day, all were confirmed bone stock as well.

Just my $.02