Dynamometer Results & Comparisons - 278/339....347/364(Edelbrock Headers) after dyno tune...odd?

Okay so I took my car for its very first dyno pull Sunshine Performance Killeen, TX...ended having a very odd experience with alot of questions racing through my mind. My mods are:

Edelbrock 1 3/4 to 1 7/8 Stepped Headers
TSP 3" ORY(With the good merge)
SLP LM1
Potz Speed P&P TB
SLP Bellows
SLP LID + K&N

New MSD Plug wires
New NGK TR55
New AMSOIL 5W30 Signature Synthetic

So we start the dyno pull(I noticed he didnt have a fan on the car for the first pull. odd?) long story short it read a 278/339..I honestly couldnt believe my eyes, after looking at endless amounts of dyno results on this forum! Mike my tuner said that alot of time these 01-02 Fbodys make around 280rwhp stock..well im not stock..then he told me that adding the above mentioned mods can actually lower my hp rating without a dyno tune(even though he street tuned it a week prior)..but wouldnt effect my torque rating that much..

He mentioned that he could do a dyno tune real quick, and get my numbers alot higher to tune everything in...he already did a street tune btw...so at this point im like w/e I cant leave with those numbers and show face on ls1tech!(lol) So I let him tune...so after about 5dyno pulls and an hour of him tweaking my tune...my number miraculously go up +69HP and +25TQ!(he said if my clutch wasnt giving out he could have got me over 350HP but was nearvous about doing another pull) Sure im happy and those edelbrock headers are torque monsters...but..wtf gives!? I like the guy who tuned my car, seems knowledgeable helpful and laid back..but ive NEVER seen anything like this posted up on here.... what do you guys think..heres a video and a pic of my max hp/tq...I asked for the before and after of all the dyno pulls he said the printer was messing up with all the lines from the 5 pulls....

http://i176.photobucket.com/albums/w170/melteddreams/photobucket-5338-1330789687401.jpg
http://i176.photobucket.com/albums/w170/melteddreams/th_photobucket-4536-1330759544032.jpg (http://s176.photobucket.com/albums/w170/melteddreams/?action=view&current=photobucket-4536-1330759544032.mp4)

I don't know much about the before numbers, but the final looks good. Maybe the car was extremely heat soaked first run? I know my cars coolant and air temp readings go way up when just sitting idling on a hot day per HPtuner logs I have, and that will effect power.

How good did the TSP y-pipe fit with the Edelbrock headers? I have those headers and no y-pipe at the moment.

They fit great as far as tuckin up and clearance...i had to gey flowmaster 3.5" to 3.0" reducer cones..my exhaust shop..had to cut a few inches off ypipe..and a little off i-pipe which actually tucked the lm1 up alot more for clearance...tbe they welded everythig up...unless u got a lift or can weld id take it to a shop..i didnt pay a whole lot either

He's playing games with the numbers to make his tune look like a miracle.

Im not too familiar with heatsoak..i did drive about 25-30min to the shop..it was about 81° outside

He's playing games with the numbers to make his tune look like a miracle.

Yea, i did think about that, but dont like to start accusing people off the bat, especially since hes the closest lsx tuner and seemed cool...my next option was 50minutes away brian at reckhart tuning austin, tx i paid $250 for the street tune..and he charged me $250 for the dyno tune after my fail results.

Your final numbers are good and expected. Your initial numbers are low, could be heat soak as a likely culprit. He may have played games with the dyno, him not giving the before graph supports that theory. You're right not to accuse, still can't be sure. How does the car drive after compared to before?

Your final numbers are good and expected. Your initial numbers are low, could be heat soak as a likely culprit. He may have played games with the dyno, him not giving the before graph supports that theory. You're right not to accuse, still can't be sure. How does the car drive after compared to before?

Well, i can def. feel the extra power in the higher rpm range...and it feels a little more powerful down low to..espwcially since i cant keep her from breakin loose and fishtailing with stock rear suspension anymore

Sweet #'s at the end! Is your car an 01-02? I'm guessing it is or you forgot to mention the LS6 intake. Either way, some really nice gains!

Sweet #'s at the end! Is your car an 01-02? I'm guessing it is or you forgot to mention the LS6 intake. Either way, some really nice gains!

yea its an '01...thanks

Well the street tune was crap then...

x2^^ he just fixed another persons problem

He street tuned it the week before right? My guess is he pulled a bunch of timing up top during his street tune and added it back in on the dyno.

I have done this to a car that I didn't have a chance to tune right away. Did heads/cam and new the stock tune was going to be off. Pulled 8 degrees of timing and threw some fuel at it just to drive it back to his house. Put it on the dyno a week later. The 8* timing I put back in once AFR was right. Car picked up over 60rwhp with the 8* +3* more (29* total at WOT).

I didn't do it to show massive gains, I did it to make sure it was going to be safely limped home. Glad I did, because I found out he ended up racing it in the week it was home before it went on the dyno. Could have been a bad choice by him if the tune wasn't fueled up and timed down.

He street tuned it the week before right? My guess is he pulled a bunch of timing up top during his street tune and added it back in on the dyno.

I have done this to a car that I didn't have a chance to tune right away. Did heads/cam and new the stock tune was going to be off. Pulled 8 degrees of timing and threw some fuel at it just to drive it back to his house. Put it on the dyno a week later. The 8* timing I put back in once AFR was right. Car picked up over 60rwhp with the 8* +3* more (29* total at WOT).

I didn't do it to show massive gains, I did it to make sure it was going to be safely limped home. Glad I did, because I found out he ended up racing it in the week it was home before it went on the dyno. Could have been a bad choice by him if the tune wasn't fueled up and timed down.


Well the street tune fixed most my drive ability issues, felt great etc....basically all im tryin to figure out is, was this intentional just to make me feel like my car with all those mods couldnt even hit 278rwhp! Just to get me to spend $250 on a dyno tune that day. If so thats some shady shit and id like to strangle the little punk

Well the street tune fixed most my drive ability issues, felt great etc....basically all im tryin to figure out is, was this intentional just to make me feel like my car with all those mods couldnt even hit 278rwhp! Just to get me to spend $250 on a dyno tune that day. If so thats some shady shit and id like to strangle the little punk

The way (I believe) Lil SS is explaining it, is that the tuner was playing it safe with his street tune. He pulled timing out and added some fuel... dialed in driveability and what not, and then may have assumed you'd want to finalize things on the dyno. Street tuning timing is pretty much impossible. You can't feel the power you're adding or losing on the street playing with timing. This is where the dyno comes in handy... add a little timing, make a pull, add a little more, make a pull, see what timing makes peak power and then maybe pull a tiny bit to keep things safe. Hopefully the guy wasn't trying to pull a fast one on you, but $250 for a dyno tune (to me) is a killer price!! Nothing shady about that. Good final numbers... enjoy the added 60 HP.

The way (I believe) Lil SS is explaining it, is that the tuner was playing it safe with his street tune. He pulled timing out and added some fuel... dialed in driveability and what not, and then may have assumed you'd want to finalize things on the dyno. Street tuning timing is pretty much impossible. You can't feel the power you're adding or losing on the street playing with timing. This is where the dyno comes in handy... add a little timing, make a pull, add a little more, make a pull, see what timing makes peak power and then maybe pull a tiny bit to keep things safe. Hopefully the guy wasn't trying to pull a fast one on you, but $250 for a dyno tune (to me) is a killer price!! Nothing shady about that. Good final numbers... enjoy the added 60 HP.

Yea i prefer the non-shady theory, sucks I didnt educate myself enough before the dyno to make sure no funny buisness was happening...He did tell me after street tune that he was able to get the car back to stock drivability around all my mods..I paid $250 for that and LOSE power..what a joke although he did say my next dyno tune would be only $250.00 which it was..so wasted that freebie..he gave me a future $75 off my next thne when i do cam package.

Either way it seems I should have just did a MOT from frost or TSP...woulda got the same drviability..more power...and wouldnt of lost power for alot less then $250

But mostly whats making me sketchy...is the crap about adding..tb exhaust headers etc would causr me to lose power...which is BS cause he did a street tune..and my buddies street tunes all made the cars faster..plus thats what hes advertising...that and making up printer issue stories about my before sheets...I guess theres no real way to find it..im gonna go back and ask for some printoffs if all logs and dyno pulls.. and tell him i want themanyways even uf the ink is messed up..maybe someone can look at them and see if any shady biz took place

The starting numbers do seem weird, but those final numbers seem very respectable, especially the torque! This makes me excited to get my setup finished. I think I am going to get a P&P TB before I get mine tuned.

How good did the TSP y-pipe fit with the Edelbrock headers? I have those headers and no y-pipe at the moment.

FWIW I believe the site sponsor SDPC still has the discounted stainless steel Edelbrock ORY that should fit with no problem. This is what I got, and will be putting it in next week. It costs a little more than the TSP, but it should fit good and you should be able to install it your self. Also no need to buy any reducers or go to the exhaust shop.

Sounds like a shady place to me :lol:

The starting numbers do seem weird, but those final numbers seem very respectable, especially the torque! This makes me excited to get my setup finished. I think I am going to get a P&P TB before I get mine tuned.



FWIW I believe the site sponsor SDPC still has the discounted stainless steel Edelbrock ORY that should fit with no problem. This is what I got, and will be putting it in next week. It costs a little more than the TSP, but it should fit good and you should be able to install it your self. Also no need to buy any reducers or go to the exhaust shop.

Edelbrock no longer makes exhaust so if you find there ory and want it you should snatch it up.

I had a hard time finding a matching Edelbrock 3.5" ypipe...everyone that I ordered from ended up refunding my money.....


But yea, scam or not...I still ended up with decent numbers and car runs great..I would have dyno tuned anyways, but not before my cam swap..ugh

Edelbrock no longer makes exhaust so if you find there ory and want it you should snatch it up.

I had a hard time finding a matching Edelbrock 3.5" ypipe...everyone that I ordered from ended up refunding my money.....

Just to try to help people out that have these headers and clear any confusion, here is the edelbrock Y-pipe http://sdparts.com/details/edelbrock/e65711. They are a site sponsor and are the only ones that seem to have it still. Also so people know, this is a 3" stainless Y. It opens up to 3.5" for the collectors but then goes down to 3". Here is a picture of it.
http://i44.tinypic.com/2rcq1q9.jpg

The way (I believe) Lil SS is explaining it, is that the tuner was playing it safe with his street tune.

You can't feel the power you're adding or losing on the street playing with timing. This is where the dyno comes in handy... add a little timing, make a pull, add a little more, make a pull, see what timing makes peak power and then maybe pull a tiny bit to keep things safe.


That's what I do, can't speak for others.

Any competent tuner though has a good idea of where the car should make good power timing wise. Example, from what I have seen stock cammed cars really don't benifit from more than 25-26* timing at WOT.



Either way it seems I should have just did a MOT from frost or TSP...woulda got the same drviability..more power...and wouldnt of lost power for alot less then $250

I don't believe in mail order tunes. See above comment. A MOT can get it close, but not perfect. Example, I did 2 cars (guys were cousins, did one, pulled it off the dyno and did the other). with Similar mods, same cam (Mid 230's duration), stock heads, same intakes, only differences was the MFG of the headers. One car liked 30* total timing and the other liked 26*



But mostly whats making me sketchy...is the crap about adding..tb exhaust headers etc would causr me to lose power...which is BS cause he did a street tune..

Was this street tune done with a wideband?
What was total advance when he started and when he finished?
Was there any knock retard?

Yes, it should have picked up, but there might be more to it.

Was this street tune done with a wideband?
What was total advance when he started and when he finished?
Was there any knock retard?

Yes, it should have picked up, but there might be more to it.

Im not totally sure, he didnt mention a wideband or any knock retard, said he mostly just "cleared my codes, lowered fan temps, got the car to drive as stock as possible with the new mods...he said that a few times actually mentioning getting the car to act stock...I suppose it would have been beneficial to know what questions TOO ask from the get go. All and all though the dynotune seems to have really done alot for it. He did mention he didnt adjust the timing with the street tune

Just to try to help people out that have these headers and clear any confusion, here is the edelbrock Y-pipe http://sdparts.com/details/edelbrock/e65711. They are a site sponsor and are the only ones that seem to have it still. Also so people know, this is a 3" stainless Y. It opens up to 3.5" for the collectors but then goes down to 3". Here is a picture of it.
http://i44.tinypic.com/2rcq1q9.jpg

Omg thats awesome, I looked everywere before I bought my TSP Ypipe and went to an exhaust shop..damn!!!!