Dynamometer Results & Comparisons - Edelbrock replaced Macs dyno results

I switched Headers from Macs untouched to Edelbrock stepped headers with the Merge colectors . Went to dyno today for Futral to retune as I had a lean condition it cold weather with the Macs. Rather tehn taking it to him to get retuned, I waited untillafter the header swap.

I dynoed at Thunders dyno day back in November and the car only put down 405/396 motor and I installed a dry nos kit and tried a 75 shot with the macs it went 465/482.

Went to Futrals and made a few pulls on the Edelbrocks with no tuning as they richened it back up to 13.5/1 So we left it there. It made 425/410 on motor and started out with the same 75 shot We made a pull and it was around465 hp but it was at 15.5/1 af so we did some tuning on that and the final numbers are 518/535 :eek2: on a 75 shot , I picked up 93hp and 125 ft lbs of tq :devil:

This is a single Nozzle in the bottom of my lid with a #42 jet at 1050 psi of bottle psi.

As for the Edelbrock to Mac comparison, The Edelbrocks Hands down sound way better, fit Better, go on easier and Are of great quality. It made power every where over the Macs not just peak. It should do well at the track, maybe a 10th but the sound is worth the swap alone.

THe ti tech coating actually looks real nice. About the same color as the aluminum heads maybe a shade darker.

Now for some Nitrous passes to see what the extra power can do :devil:

The numbers in my sig are from when my f13 cam were tuned. This is what I am compareing the new numbers with , not what the car dynoed at Thunder as on dyno days you only get 2 pulls. It takes 4 or 5 pulls to get everything warmed up good to get the best numbers .

What injectors and pump are you running with the dry kit now?

Gomer, I am running a walboro 255 and 30 psi fms Inj.

Congrats - Great gains!! I sure wish they made those in 1-7/8 to 2 stepped - that coating is nice.

Great numbers!

John, you going to Ervington on the 20th? I am still going but I went to No problem last night and my car hooked good the first 2 passes 1.62's leaving at 4500 instead of 6000 So here is another comparison for the headers. the macs would bog down at 4500 with the aluminum flywheel. I just could not get a good clean 3rd gear shift in last night for nothing . The tranny fluid is getting changed before Ervington , Lucas is good in warm weather or after driving the car for a while but sucks when the car was trailered and 45 deg outside. WE were running 1/8th mile and having to shift slow and with a sucky1.77 60 ft ( worn out m/t drag radials) I went a 7.53 @94.88 mph

If I drive it harder I believe it will se 95+ mph in the 1/8th.

where u get them from... i have the mac mids with my f14 cam and 4000 converter and 4.10's.. same tires.. glad to see you pulling nice 60fts and traps with that setup.. gives me HOPE for tommorow when i run mine!

Scoggin Dickey , talk to Kris. Macs were not really hurting my times though, I believe for power alone they were not really worth the swap on a mild setup. ON the nos or a stroker of any sort, they are better though. THe sound change was worth it to me though.

Nice #'s on track & dyno man :devil:

Scoggin Dickey , talk to Kris. Macs were not really hurting my times though, I believe for power alone they were not really worth the swap on a mild setup. ON the nos or a stroker of any sort, they are better though. THe sound change was worth it to me though.

Sounds clip would be awesome though :)

peace

Very nice results. Thanks for posting up. We need more Edelbrock comparo results like this. :cheers:

I cant knock the qtp's for the price but these edelbrocks are the best bang for the buck out there IMO. no Slag in the primary tubes and all quality peices and everything you need to hook them up including o2 extensions. If you want to put your emissions back on later , they come with all the fittings to weld in yourself.

So, just to be clear, did you get the slip-on merge collector or the fully welded LT's (merge came already in place)?
If you got the slip ons, did you weld them on? Did you weld the O2 bung into the Y or the collector?

And, also, you gained 20rwhp/14rwtq NA? Correct? That's great!

Nice #'s on track & dyno man :devil:



Sounds clip would be awesome though :)

peace
I willl get a clip tonight , but may have to email the file for some one to host it.

So, just to be clear, did you get the slip-on merge collector or the fully welded LT's (merge came already in place)?
If you got the slip ons, did you weld them on? Did you weld the O2 bung into the Y or the collector?

And, also, you gained 20rwhp/14rwtq NA? Correct? That's great!
I am not sure of what the gain was because last time I dynoed the car , it was down on power. That was at Thunder racing and no warm up pulls.

The only true way for me to tell is go to the track and look at mph. I know at 2800 rpms, the Edelbrocks were making 365lbs of tq and the macs were at350 at 3200 rpms.

at 3200 rpm's the edelbrocks are at 370. but for some reason the Macs hit 400 ft lbs at 3800 and the Edelbrocks dont hit 400 untill 4500 but carry out over 400 lbs to 5300 where as the macs were down to 380 at 5300.

They moved the tq curve up in the rpms further where I will use it leaving at 6000 compared to tire frying tq down low. I will see if I can get a graph up later along with my last one from futrals back when allan tuned my car last time. I do think there is a little wear and tear starting to take place on teh bottom end though . It will show in mph next time I go 1/4 mile.


difference between this time and when the car was first tuned is I now have a aluminum flywheel helping the hp a little but it was on there when the car was dynoed at Thunder as well. I will confirm the mph difference and let every one know.

Oh I got the slip on Merge collectors. I did not weldthe tubes on , just put a tac weld on each tube to make sure it does not fall off. they fit so tight that I dont believe they will leak.

i put the o2 in the collector by Futrals recommendation.

http://video.ls1tech.com/player.aspx?fileid=CF53457A-8558-4018-BCDF-E1A6994EC269


Try this link. I dont know if this is my wot pass or a idle clip as I cant get my speakers to work.

I have others I will edit in later

here http://video.ls1tech.com/player.aspx?fileid=71DC76EC-5F43-4034-B9DB-919ECBE386F6

and the last one= http://video.ls1tech.com/player.aspx?fileid=17A4F468-59A7-47A3-B7A4-6E94F864990B

http://video.ls1tech.com/player.aspx?fileid=CF53457A-8558-4018-BCDF-E1A6994EC269


Try this link. I dont know if this is my wot pass or a idle clip as I cant get my speakers to work.

I have others I will edit in later

here http://video.ls1tech.com/player.aspx?fileid=71DC76EC-5F43-4034-B9DB-919ECBE386F6

and the last one= http://video.ls1tech.com/player.aspx?fileid=17A4F468-59A7-47A3-B7A4-6E94F864990B

Thanks for vids man & hopefully ya could break your own PB :)

peace

http://video.ls1tech.com/player.aspx?fileid=CF53457A-8558-4018-BCDF-E1A6994EC269


Try this link. I dont know if this is my wot pass or a idle clip as I cant get my speakers to work.

I have others I will edit in later

here http://video.ls1tech.com/player.aspx?fileid=71DC76EC-5F43-4034-B9DB-919ECBE386F6

and the last one= http://video.ls1tech.com/player.aspx?fileid=17A4F468-59A7-47A3-B7A4-6E94F864990B

The sounds of lack of traction. ;) :judge:
Sounds great, like the Edelbrock catback sound.

The sound is awsome through the Edelbrock cat back but it dont flow worth a shit. I lost 24 hp through the muffler over the cutout

I think of it as a way of slowing down at the track when I get warned for going to fast. .3 and 3 mph from the cutout.

all I need now is a electric one to flip on the fly

So your numbers are with a cutout and not thru mufflers?

Any pics of the Edelbrock headers with merge collectors?

http://www.ls1tech.com/forums/showthread.php?t=419553&highlight=Edelbrock

This thread has PIcs in it. Yes that was through the cutout.

Nice #s Chad! I'm glad you finally swapped over to the LTs. :D

Jason

I could not pass it up Jason, I have the Macs sold for $300 and it was going to cost $250 for allan to build me a ypipe 3" and I only paid 480 shipped to the door.

I have $180 invested in a better set up. Although the Macs were right there on hp. The tq curve alone of the Edelbrocks I believe will be a better curve for where I race at.

http://img.photobucket.com/albums/v249/chad12345/f13dyno.bmp

This is a graph with the Macs, and below is a graph with the Edelbrocks.
http://img.photobucket.com/albums/v249/chad12345/dynowithedelbrocks.jpg

and below is a graph on a 75 shot

http://img.photobucket.com/albums/v249/chad12345/Edelbrocksand75shot.jpg

Congrats Chad, trying to DL the soundclip now lol...

-Will

Is that with the edelbrock ypipe?

Yep, Edelbrock y pipe is a real nice peice.

Went to the track last night and the weather was verry shitty. It was raining all around but at the track so atleast I got in some runs. I ran lots of passes but it took a few to get the feel of the 3rd gear shift as its getting notchy.

All in all it matched the Macs peformance but in a lot higher DA. DA was 640+ last night compared to -750 last time with the Macs and all this was with a bad MAF . NEw one is on order with Futral , just waiting for it to come in.
Because of the bad MAF, I did no nos passes last night.


I ran

1.61 -60 ft
7.32 - 1/8th mile at 93.5 mph
11.48 @ 119.04


then ran
1.60
7.30@93.4
11.47@118.89

then

1.590
7.28@94.1 mph
11.425 @119.74 mph

Last pass was going to be good but got clutch slippage in second and it showed in 4th bouncing the rev limiter at the end slowing me down

1.60
7.31@93.8
11.48 @116.3 hitting the rev limiter


SPec 3 slipped , I hope it is just from hot lapping it. If it gets worse , I think it will be replaced with a build 200 r4 or 700 r4.

I am pleased with the change considering that the DA was over 1000 feet different to the badside.

89% humidaty

Awsome comparison. Thanks for the info. Our cars run really close on times and have similar mods.

what are your mods? what gears and vehicle weight?

Pacesetter Headers
LS6 Intake
S2 TB
4.11 (12 bolt)
Patriot LS6 "Style" 64 CC 2.055/1.60 REV
F13 112+2
Pulley
3" True Duals thru Borla XR-1's.
QA1's

60' - 1.68
1/8et - 7.432
1/8mph - 94.71
1/4et - 11.53
1/4mph - 121. 55


Race weight 3650lbs DA +500

Now I am glad about going from Macs to LT's, and a cut out.

I dont knock the Macs for a bolt on car or even a mild driven car. However, I beat the hell out of my car at the track , dump clutch at 6500 rpms and shift at 6800 rpm's and that is why my car is quicker with the long tubes. On a car not driven as hard, I dont think the Macs were hurting much.

The sound is awsome though.

Black02ss, Your car is strong. I would love to put good heads on my car and run some 10's because you have me in mph for sure. Get those 60 ft's down and you will go low 11's for sure. and 10's when you get some good -600 air.

Black02ss, Your car is strong. I would love to put good heads on my car and run some 10's because you have me in mph for sure. Get those 60 ft's down and you will go low 11's for sure. and 10's when you get some good -600 air.
Thanks. The best she has seen was a 1.64'. Its really not a track car so she is hard to get to 60' well. If I could muster a 11.3@122+ out of it I would be extatic! I can't remember the last time we saw any - air here. I was tickled to get +500. :lol:

Do you run skinnies on the front?

Do you run skinnies on the front?
Did I, No. Was it a scary ride, yes. Will I in the future, :nod: You bet. After the 1/8th she was all over the track.

I have radial fronts and m/t drag radials in the rear. drives straight as a normal street tire would.

Best mph that I ever made in the 1/4 with the 275x40x17's in the front was 120.30 mph. 121.3 was with skinnies that I borrowed when I ran 11.38 . I have run lots of 11.40's with the front 17's though.

Here is my thread with pics:

http://ls1tech.com/forums/showthread.php?t=441706