New Time with Headers - ZR-1 Net Registry Forums

Hammer · 04-07-2008

I added some Watson headers over the winter and took the car out for the first time yesterday. I was rewarded with a best of 12.532 @ 112.79. Best time last year here in Boise was 12.959 @ 109.17. That's a gain of .427 in ET and 3.62 MPH.

I think the headers were a good addition. They sound great and the cars pulls really well through the gears. There might be better times available as I noticed the clutch slipping on the way home. I'll get that replaced and try again later.

04-07-2008

Good times John.

On the clutch, you may have just overheated it some. Take it out later and load it up and see if you can get it to slip.

4DSZR1 · 04-07-2008

Great run John, looks like what you thought it should be.

flyin ryan · 04-07-2008

apples to apples & mods to mods for 2700ft. uncorrected altitude that time is stout, nuf said

Hammer · 04-07-2008

Thanks guys. I like the term stout Ryan, that's cool.

Needless to say I'm looking forward to the Gathering and some near sea level runs. I'm thinkin' 12.30's @ 118 will be possible based on what I picked up there last year. Whoopee, come on PNW Gathering.

tomtom72 · 04-09-2008

Quote:

Originally Posted by flyin ryan

apples to apples & mods to mods for 2700ft. uncorrected altitude that time is stout, nuf said

Ugh, forgot we don't have the 'I agree' icon.....Man John that is waaaay stout!

Stock 375 motor except for headers?

Tom

Hammer · 04-09-2008

Quote:

Originally Posted by tomtom72

Ugh, forgot we don't have the 'I agree' icon.....Man John that is waaaay stout!

Stock 375 motor except for headers?

Tom

Not stock, I have the following add on's:
Watson Headers - No Cats (yet)
Open Lid w/ K&N Filter
Coplon Duct
Marc Haibeck Chip w/ Calibration for the headers
Flowmaster #17115 Cat Back Exhaust
Hurst Short Throw Shifter

The 12.532 run was with a launch at about 3500 RPM's, may have been a little higher too, I don't really watch the RPM's as I am trying for good lights. RT's that day (first of the season) were .121, .113 and .116. I usually run about 28 to 30 lbs of air in the front tires, but didn't let any air out as I wasn't really looking for good lights here (just a T&T). I have the Goodyear GS-D3's and I heat them up with a rolling burnout (no water) and 25-26 lbs of air. The car hooked real well with a 60 ft time of 1.928, the best 60' I've had to date.
Ryan used NHRA correction factors and this run at sea level calced to a 12.12 @ 116.60

Hammer · 04-07-2008

Quote:

Originally Posted by 4DSZR1

Great run John, looks like what you thought it should be.

That's exactly what I was hoping for Rick. Now you gotta plan on going to PIR at the Gathering so we can get you hooked.

Polo-1 · 04-07-2008

dont make me use the spray

Good runs. Where are you shifting @ with the headers?

Hammer · 04-07-2008

Quote:

Originally Posted by Polo-1

dont make me use the spray

Good runs. Where are you shifting @ with the headers?

Right at 7k. I've only run three times so haven't got a chance to see what 6500 will do for the times. I ran my best at PIR shifting at 6500. Hope to get a new clutch in it and try again on May 10th.

04-07-2008	#2
Jeffvette Guest Posts: n/a	Re: New Time with Headers Good times John. On the clutch, you may have just overheated it some. Take it out later and load it up and see if you can get it to slip.

04-07-2008	#3
4DSZR1 Join Date: Dec 2005 Posts: 692	Re: New Time with Headers Great run John, looks like what you thought it should be.

04-07-2008	#4
flyin ryan Join Date: Aug 2006 Location: Edmonton, Alberta or Phoenix, Arizona Posts: 2,741	Re: New Time with Headers apples to apples & mods to mods for 2700ft. uncorrected altitude that time is stout, nuf said __________________ There are no limit's mans ingenuity, just as mans ingenuity will never conquer the forces & behavior of this planet...Smokey Y.

04-07-2008	#5
Hammer Join Date: Apr 2006 Location: Ideho Posts: 2,653	Re: New Time with Headers Thanks guys. I like the term stout Ryan, that's cool. Needless to say I'm looking forward to the Gathering and some near sea level runs. I'm thinkin' 12.30's @ 118 will be possible based on what I picked up there last year. Whoopee, come on PNW Gathering. __________________ [I][FONT=Comic Sans MS]John Boyd[/FONT][/I] [I][FONT=Comic Sans MS][SIZE=1]Ideho[/SIZE][/FONT][/I] [FONT=Comic Sans MS][SIZE=1][I]2015 ZL1 [/I][I]Camaro #1121 BLACK/BLACK 6 SPD (540 RWHP)[/I][/SIZE][/FONT] [I][FONT=Comic Sans MS][SIZE=1]1991 ZR-1 #458 [COLOR=red]RED/[/COLOR][COLOR=black]BLACK 72[/COLOR]k miles ([B][COLOR=red]SOLD[/COLOR][/B]) 1991 ZR-1 #473 [COLOR=red]RED/[/COLOR][COLOR=black]BLACK [/COLOR]37k miles ([B][COLOR=red]SOLD[/COLOR][/B])[/SIZE][/FONT][/I]

04-07-2008	#9
Polo-1 Join Date: Sep 2005 Location: Washington Posts: 955	Re: New Time with Headers dont make me use the spray Good runs. Where are you shifting @ with the headers?

04-07-2008	#1
Hammer Join Date: Apr 2006 Location: Ideho Posts: 2,653	New Time with Headers I added some Watson headers over the winter and took the car out for the first time yesterday. I was rewarded with a best of 12.532 @ 112.79. Best time last year here in Boise was 12.959 @ 109.17. That's a gain of .427 in ET and 3.62 MPH. I think the headers were a good addition. They sound great and the cars pulls really well through the gears. There might be better times available as I noticed the clutch slipping on the way home. I'll get that replaced and try again later. __________________ [I][FONT=Comic Sans MS]John Boyd[/FONT][/I] [I][FONT=Comic Sans MS][SIZE=1]Ideho[/SIZE][/FONT][/I] [FONT=Comic Sans MS][SIZE=1][I]2015 ZL1 [/I][I]Camaro #1121 BLACK/BLACK 6 SPD (540 RWHP)[/I][/SIZE][/FONT] [I][FONT=Comic Sans MS][SIZE=1]1991 ZR-1 #458 [COLOR=red]RED/[/COLOR][COLOR=black]BLACK 72[/COLOR]k miles ([B][COLOR=red]SOLD[/COLOR][/B]) 1991 ZR-1 #473 [COLOR=red]RED/[/COLOR][COLOR=black]BLACK [/COLOR]37k miles ([B][COLOR=red]SOLD[/COLOR][/B])[/SIZE][/FONT][/I]