All runs made at Bristol Motor Dragway on 205/50/15 Azenis.

Stock car with 5-lug, 34'ish psi, averaged 17.7
17.584 @ 76.53
2.478 60'
1/8 - 11.178 @ 62.49

no back seats or 1/4 panels, averaged 17.4 (best was 17.1 but I can't find the slip)
no muffler (still had piping, still on Y7 manifold)
34'ish psi
clutch and flywheel
17.339 @ 76.63
2.511 60'
1/8 - 11.035 @ 63.18

with mods first listed, averaged 16.55
16.412 @ 80.90
2.316 60'
1/8 - 10.407 @ 66.29

I was going to do some comparison runs of ZC 3rd vs stock 3rd, but the track got busy and I didn't have time. As it is right now I top 4th out at 82mph, so with a better 60' I would need a higher rev limit to keep me from having to go to 5th. I'm sure with more track time I can get it down to a 16.1 or so.

Launches were at 5,500-6,000. Spinning then hopping. Tires were at 39psi after a couple minutes of cooling (never checked them before running). The CMC allows me very quick shifts so I don't think skipping 3rd and going straight to 4th would make me any faster, slower if anything.

I don't know the power of the engine but I've had it for over 2 years now. Every day I've driven it it has seen the red line a couple of times. I'd be surprised if it made 70whp on a dynojet, which I plan on getting it dyno'd next month for a before/after comparison with the Y8 manifold open and custom SMSP header open. I will also do a comparison at the strip for the 2 manifolds.

As for now I am putting in a 1.066 VX 3rd gear for 4th gear so hopefully that won't make me too much slower. I'm going to play around with the gearing before I do anything else to the engine. I'll either go 4.928 final drive and .878 5th gear or keep the 4.71 and see what it does with the Infinitude close gear set. I'll probably get an SAFC once I get the header so I can have the A/F adjusted on the dyno, I'll use that to raise the rev limit to 7,200. I might throw the 1.172 back in for 4th just for a comparison if I can get my 60' down. I will also be changing over to an EX case and use the EX 2nd gear as Quaife no longer makes a diff for the small bearing cases.

For now that is all.

The monster in all its stock D16Y7 glory.

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VTECH, V-TEC, VTEK? who cares?

2008 Scion xB
2006 Volkswagen Beetle GLS "Geek Squad"

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Past Cars
91 LS-S--Sold $1,500
94 EG Coupe I/-- R.I.P--Sold for $700 as shell

sms-products.com

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Tires were at 28 psi, changes were a 1MD clutch versus a 1MS (same pads, but disc is lighter due to no springs, 1MS disc had lots of life left in it but I destroyed the pressure plate, pics later). Put an EX trans it it since I destroyed the Y7 trans (crossthreaded interlock guide bolt and it came out). Also put the Y7 exhaust manifold back on, still no exhaust. Low end power feels a lot better with it, more sluggish in the top end. But definitely quieter. No more turning up the radio all the way to hear it. Also, the EX 2nd gear feels nice. Overall the EX trans is pretty nice, but the gears are still way too long as you can see by my new times. Never hit 4th with it. Only got 3 runs in.

Best was:
1/4 - 16.822 @ 78.91
2.418 60'
1/8 - 10.651 @ 64.22

Was launching and half slipping the clutch, no pre-load. Would drop to 5,000 and spin through 1st, no wheel hop.

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Quote, originally posted by Bense »

awesome

good research

swed

Nice build, I knew someone that had a y7 that could take b16s until it blew. Can't remember the 1/4 mile times though.

My engine is stock. I said I plan on getting a Skunk2 IM. Although my SMSP header will be here in about 2 weeks.

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Changes:

Azenis in front on Slips
CRV's in back on Ziex (45psi)
kept spare Slip/Azenis in hatch
Adjusted valve lash tighter than OEM spec on IN, tighest OEM spec on EX (do a valve lash day before each event I do)
removed AC belt
SMSP big tube header
SMSP race exhaust

Best run
2.719 60'
1/4 - 16.043 @ ??? (mph was sporadic most of the day)
1/8 - 10.942 @ 66.53

2nd
2.522 60'
1/4 - 16.386 @ 184.47
1/8 - 10.491 @ 67.36

(couldn't figure out why this run was slower being I had a better launch and 8th)

3rd (last)
2.500 60'
1/4 - 16.298 @ 83.52
1/8 - 10.450 @ 67.78

Gearing setup was stock EX with SRR 4.71 FD.
With a better launch and 1.066 4th I think it would do mid-15's.

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Z6 longblock, didn't do a valve adjustment since I put it in. I don't know how long its been since its had one. Has about 140k on it. Threw a rod in the Y7 LX/VTEC (Z6 head) so this was a quick replacement. Stock P28. Generic short ram (Z6 IM/TB). SMSP big tube/race exhaust.

For the trans...

Back to the OEM CMC.
New OEM slave cylinder.
Stock EX FD.
MFactory close gear set with 1.259 4th.

Won't have a spare in the back this time. The Azenis I'll be running up front are bald and old so I don't know how good they'll grip. I'll post results tonight when I get home from the strip.

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Thats a pretty nice trap ha. Love your work, you are one of the reasons some of us choose to stay N/A.

92 CX Hatch
I ♥ my SOHC (again)

Quote, originally posted by BUiLTB18C-R »

vtec controllers are cool though. you can set your vtec at 700rmp's to gain 100 whp

Ron Paul 2008

I'm not even NA, just stock with bolt-ons. NA will be next year.

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92 CX Hatch
I ♥ my SOHC (again)

Quote, originally posted by BUiLTB18C-R »

vtec controllers are cool though. you can set your vtec at 700rmp's to gain 100 whp

Ron Paul 2008

Had a CEL come on on the way to the strip. No VTEC.

Lost the exhaust donut so I almost debated even putting the header on. I went ahead and put it on, no exhaust.

bald and cracked Azenis in front so I'm sure they didn't do any good.

No exhaust hurt the midrange pretty bad, which is where I was after shifting.

Full size spare in the back.

60' - 2.418
1/8 - 10.240 @ 68.05
1/4 - 16.029 @ 84.88

On this run I felt like the power was dropping off in 4th so I put it into 5th and missed.
60' - 2.611
1/8 - 10.541 @ 67.91
1/4 - 16.483 @ 79.71

60' - 2.505
1/8 - 10.417 @ 68.33
1/4 - 16.194 @ 84.87

All in all not too bad I guess. The LX/VTEC felt a lot better before it blew. The new engine just doesn't feel like it has as much balls. Not sure what the Z6 primary specs are, but I think powerwise (with VTEC not working) it was actually a little less than the stock Y7 was with the header and exhaust.

Thats the last time I can run it this year. So that brings my gearing comparison on a stock'ish engine to an end. Next year I'll have a fresh build and will focus on the driver and suspension. Hopefully this has helped some of you decide what to do with your transmission setup.

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I might talk Rocket into doing it for me one day though. Until then, I don't want to tie him up with a long ass job. A Z6 head will be much quicker for him to work his magic on, and will transition the power better than a nonVTEC (which I need since I track my car. Drag isn't a very big concern to me).

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