http://www.chevyhiperformance.com/ IMHO, this is one of the better magazines out there. Instead of writing up on Bel Airs and ridiculous projects and having "How To" articles so vague you wonder if they are written in the "King James Version meets Martha Stewart working on cars"....this magazine which I have just recently started to read is very helpful.

They are doing a 3rd gen build up. They've spent about $3,500 or so, which is a decent budget. However, they are only running 15.82....rather (very) disappointing to me.

These guys aren't out there trying to blow smoke up anyone's Pimply A-Hole (my favorite line from Me, Myself and Irene). So what gives. They seem to have all of the right parts. I didn't see what compression they were running, so with that time I'm guessing around 8.5:1.

What's the story with this buildup anyhow? $3,500 to be that slow still?

I haven't entirely ditched the idea building up my 305 to see what I can do, but man, that is discouraging. Now I know that my stock set up is faster than that, and I am probably in the high 14's right now. It just seems odd that they've done all of those things with little results.

Now read this link.

http://www.hioutput.com/tech/400hp/400hp.html

Now if I do a 305 build up, I won't use all of those parts. Single plane manifold just won't fly, and I won't be running up to 7,200 rpm!!!

Here's another combo....
http://www.hioutput.com/tech/343hp/343hp.html


Just some food for thought.



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http://www.gruveb.com/z28

 

yeah, I have been reading the articles as they come, I'm waiting for the new issue though...

Sorry man, there's no way that your stock engine would run high 14's.

-=-Mike

 

Big discussion about that buildup in the aftermarket parts section. I know I am certainly not too happy with their results, I'd dump my car in a river if I spent all that and didn't run better than that...

BTW, multiple L69 cars have run high 14s dead stock (in decent tune, decent driving) so I'm with you...

------------------
Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray

 

Burnt,

I'm not running stock right now. I guess that kinda leads into my point. I have not completed my upgrades, only done intake, cam, rocker arms (roller tip), ignition system and carb.

And I'm doing way better than they are.


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http://www.gruveb.com/z28

 

burntblues
It is VERY possible for a stock (heads/cam/bottom end) to run 14's. MANY people on this board are in the 14's with a untouched 305. I ran a 15.0 @ 91.5 last year, and recently ran dead even with a Mustang that I know runs 14.7's at the worst.

As far as the article, I think they are at a pretty high altitude track. Are those times corrected? If they are I'd say they are pretty sad. Lets NOT make this another 305 vs 350 thread, but it seems articles like that seem to steer people in the 350 swap direction. It kind of reminds me of an article I read last night from an old Hot Rod where they put a 383tpi in a 85 iroc and ran a 15.0 vs the 15.2 stock. Sure they hit 12.9 when the turned on the spray, but I'd bet the 305 would match those times on the gas. The moral of the story, sometimes mags just plain suck.

peace

 

THey started with an LG-4 equippped car if this is the article I think it is (can't open the link). There are multiple things holding the LG-4 back. Change any one of them and you get little in return. Change them all and you get much better results. Getting an LG-4 in the 14s with just bolt-ons is tough (even if you consider rear gears a bolt-on). They really need a decent cam to make a serious HP boost. The stock cam is pathetically weak.

 

Those were corrected times, I believe.

I just found it interesting that they've done the whole thing, and still have very little to show for it. I suspect that with higher compression and a better cam the car would really scream. Everything else is in place and ready to go.



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http://www.gruveb.com/z28

 

Man, I thought it was a L69...LG4 makes more sense, but still that slow? Is it possible they got a dud?

 

well if you notice, they spent 3500 total on the car, thats wht i paid for my 87 z 305 tpi, and it ran high 15's as it was, so im not too disappointed, you get what you pay for. not too mention the baaseline was 17.xx, so 3500 for 15's? a little bad. 3500 for 2 seconds? not too shabby. kind of a compromise. idve liked to build that tpi 305, but some bit*h stole the caar and stripped itr, now its got a 305 rwhp 350 tpi in it and im glad, but that 305 hs potential, just not as much. idve been proud to say its a 5.0 after winning a race, but oh well. anyway, 3500 includes purchase price and a lot of stuff just to get it running right, new cat(wouldn't spin past 2200, ouch), tune up, etc.

 

Here's the specs on on a 305 [310]that should be very streetable and put 387 hp@6000rpms 367 ft. lbs.torque@4000 rpms. The cam specs were 218/223@.050 duration 460/470 lift with 1.5 rockers 110 lobe centerline. An Edelbrock RPM intake and 650 dp holley,TRW ft pistons/ 9to1 comp.The heads were AFR's with 1.99/1.55 valves 190cc intake volume.These heads would be exspensive and a little much for streer driving,but ported gm alum.L98's 1.94/1.50's would'nt drop much.

 

Their engine was a .030"-over, roller-cam LG4. It has flat-top pistons, so compression is in the 9.5:1 range.

The times they list are altitude-corrected only, not density corrected. With exhaust and cam only, they were running corrected times in the neighborhood of my uncorrected 5800' stock '86 LG4 times. Sad, indeed.

They really wimped out on the cam. If they had gotten something bigger, their times would most likely be more respectable, and they'd still pass emissions.

------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4 (restalled TC). Ported World 305 heads, Crane PowerMax cam. ZZ4 intake, oil pump, pan & baffle. Accel HEI SuperCoil & module. Hooker 2055 headers, 3" Catco cat & 3" catback w/dual-opposite Flowmaster. 2.93 limited slip, Spohn SFCs. AMSOIL syn lubes bumper-to-bumper. Daily year-round driver. Best ET, speed TBD...
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 700 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).

 

That engine ceased to be an LG4 when they changed the cam (still mild though), heads, intake, exhaust, and compression. So there is nothing LG4 about it, but they still ended up with one slowass 305 for all that work. Doesn't make much since that it would be that slow.

They are running at LACR, which is like 2800-3000 ft elevation I believe. They corrected the times for that elevation. They didn't mess with the density altitude stuff, don't know what effect that would have had. Even if the density altitude accounted for another 2000 ft I think the time would still suck. That would only knock off a couple tenths at most, a measly 15 still...

------------------
Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray

[This message has been edited by Ray87Z (edited November 08, 2001).]

 

I am at an altitude higher than that. While it makes a difference, it's not that big of a difference.

The CAM in that car does SUCK!!! With that set up and a more aggressive cam, that engine would probably scream.


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http://www.gruveb.com/z28

 

Just for proof.
My 91B4C went some 14.90 and 14.80 with just a K&N with about 80K on the bone stock 305, when I first got it. That was the whole car was stock, I went out for a base line - with just the K&N. I'm hoping to go back out before the 383 swap and bust a 13.90 with the 305. The car in chevy hi/po is what gives the 305 a bad name, its a pig

------------------
91 B4C 305 TPI - SOON TO BE 383
TREMEC 5-SP, STOCK 1-BOLT REAREAND w/342 GEARS, K&N, AIRFOIL
EDELBROCK HEADERS, DUAL CAT TO HOMEMADE Y-PIPE & 3.5" SINGLE PIPE W/ FLOWMASTER, CRANK PULLEY, MSD, FUEL PRESS REG, COWL HOOD, WELD WHEELS
14.1@ 98MPH
-------------
OTHER RIDE
67 CAMARO - STREET CAR, BIG BLOCK, PUMP GAS
350TH w/ATI 10", 12-BOLT w/373 GEARS
10.47@129 1.55 60FT. ON MOTOR - ET-STREETs w/MUFFLERS