new87

Well I made it to Byron Dragway today, as I stated in my other post. I was just going to run T&T but ended up running the Street Eliminator for $500, I ended up putting the track points leader out in the first round of eliminations. Ran a 14.292@97.01 on a 14.30 dial-in he broke out even worst. Second round I had a 14.28 dial and ran a 14.280@97.28 on a .487 red light. The 14.280@97.28 is my best N/A time. So I take the car to the pitts and get it ready to run the bottle, jetted it for 100hp. On the 1st pass I luanched at 1250 and hit the switch at the 60' mark, I ended up with a 13.139@107.93 on a 2.009 60'. I was very pleased with the mph but not the ET. Let the car sit for about a hour and made my second nitrous pass, this time I luanched with the system armed and ran a 12.984@104.45 on a 1.933 60'. So I'm very happy with both ET and MPH on this run. The car was runnning great so I seen no problem with running the 150 shot, so I go back to the pitts and put in the 150 hp jets. I luanched at 1250 rpm's and armed the system at the 60', and ran a 12.930@105.57 on a 1.980 60' not the bad for arming the shot at the 60' mark.

Now from the final run of the day, this time slip blows my mind. On this slip I luanched at 1250 rpms with the 150 shot armed. I will post the hole slip see if you guys can make scence of it. All the times went down and the MPH increased but the darn ET went the wrong way. Well here we go:
60' 1.870
330' 5.375
1/8 8.314
mph 84.97
1000' 10.879
1/4 13.036
mph 106.99
Time slip from best ET pass:
60' 1.980
330' 5.472
1/8 8.335
mph 86.22
1000' 10.810
1/4 12.930
mph 105.57
Buy the way, this is on a stock bottom end and stock heads besides new valve springs 305 !

BADDEST305

good job dude!!

TunedPort 335

:lala: :lala:

Vader

I'm impressed with just the N/A numbers. Nice work!

For some reason you seemed to have lost somethinig at the end of the run (1000' +). ¿?

Did that PROM work for you?

Joe944

It seems like you lost a little time between the 1/8 mile mark and the 1000ft time on the higher mph and lower et run. Did you shift exactly at the same times on both runs?

ROC-Z

On your last run, your getting out of the hole faster than your best ET pass. But going the last half of the track your slower.

I myself, wonder why this is too. So basically the added 50HP is only getting you 1 MPH more? I would have assumed you'd see more than a 1 MPH gain. I wonder if fuel starvation was a problem on your last run????

B4Ctom1

I was checking out the pics in another post and that seems like a mighty serious setup for a 305 this is a power adder class right? is this a rebuilt 305? forged piston type? I would get straight crazy with the nitrous if so. other wise I would love to see you toss this on a 406 or even a 350-355 to see what happens. If you are not running nitrous I am very curious of the setup (cam, heads, compression, etc.)

NufNuffZ28

iTrader: (10)

You were probably running low on nitrous or low bottle pressure.

Chris

Tim Burgess

Very cool to see another 305 putting the spank on some of the bigger cube rides!

Willie

iTrader: (1)

Recognition is definitely deserved. There aren't too many of us in our little informal 12-second 305 club. And it sure is gratifying beating up on the "big" boys, isn't it? One of my favorite runs was against a 1970 440 'cuda, New Mexico plates, "1 BAD FSH". Needless to say, I spanked him.

new87

The car is an auto I let it shift on its own in OD, but the RPM's had to be close to the other runs. The problem was I ran low on nitrous and the pick tube picked up a little more at the end thus the higher mph with a lower ET. I'll be back to the track with the 150 shot with a full bottle on June 1st this Sunday.

Joe944

Ahhh gotcha, nice runs. Hopefully If i get a 305 (rather have a 350 but I want a stick to play with hehe), I don't know if I'll go the nitrous route. Maybe after I do heads/cam and all the rest of the stuff.

Willie

iTrader: (1)

Guys,

You've got to know that Tim Burgess has run his times with ported stock heads! Amazing!!

Willie

Timz2882

iTrader: (1)

So u left it in OD and not Drive? nxt time leave it in Drive and not OD becuz the OD will slow u down from what ive heard and seen.

JAYDUBB

What!!!

What mods, if any?

BTW... I have a 91 RS now!!!

Tim Burgess

I'll email you my mods list........

CamaroRS385hp

yeah leave it in D, not OD

you prob. already know, but if it's in overdrive and you have it floored, it won't shift into fourth. and if you're in fourth and floor it, it'll downshift to third. don't exactly know why but it's a pain in the ***. they sell some kit to fix this stupid situation.

if you've never noticed, try it sometime on the highway. in 3rd, floor it and you'll watch the rpm's continue to climb and not shift. then let off the pedal a little and it'll shift up. then floor it again and it'll shift down

kickass times by the way, i never expected that from a 305 (not like i can really talk cause i'm pushing a whopping 191 or something like that from my 3.1, but a 5.7 rebuild is in the works so i won't be lacking power for too long!)

AutoRoc

iTrader: (1)

Nice work man. I'm still hunting for 12's on my 150 shot unfortunately. Best was a 13.30 on a 100 shot @ 105.. 1.84 60 foot, then a 13.15 @ 107 with the 150 shot getting me a 2.05 60 foot The 50 extra hp is killing the tires on the launch, plus I'm lowered now so that doesn't help. I'm waiting for my new trans to arrive, then I can have better shifts and install my converter too. Hopefully those will put me deep in the 12's, then maybe a set of Et Streets for better numbers. Keep chippin away at that time man, goodluck.

Supercharged84Z

it seems like you should be able to pull faster 60' times..do you have any suspension mods?

new87

I have Lakewood drag shocks50/50 and struts70/30, Hotchkis LCA's and Panhard, and a set of Spohn SFC waiting to be installed (went to the body shop to get a quote today). I'm running on a worn down set of BFG drag radial that I dont think are working so well any more. I think I need to order a set of LCA relocation brackets and a bigger torque arm also.

83 Crossfire TA

iTrader: (2)

Well, there's your problem... I've been running 1.7's and 1.8's with a stock suspension and radials.

Totally stock with an aftermarket panhard rod works (you'll only notice the panhard rod on the 1-2 shift). Air bags in the rear springs add some tunablility (I've run good 60's with or without both of these, but it's easier with the 2). Relo brackets are a waste of time unless you're making more power and running much softer tires (real slicks or dot slicks).

mypontiac

Yo Tim!!!!

Do you still have stock pistons and crank????

Sweet times.

Dan88IrocZ

Buy the way, this is on a stock bottom end and stock heads besides new valve springs 305 ! (thats what he said isn't it?)


There is actually nothing questionable about his setup. He is probably a very good driver that can utilize a transmission to his advantage. He has a cam swap, headers, exhaust, air foil, free mods, and radials...14.2, thats not all that shocking. Several LO3 guys swap to LT1 cams & swap to carb and break into mid 14's.

Granted, without the Nitrous...he would probably never break into the 13's with stock heads. Unless he could pull better 60 foot times magically.

If I were you, now I would buy a cut out and run open headers at the track (unless you aren't already), then I'd do an AFPR. I bet on the juice you could see a tenth or two just with those cheap mods. Then, it's time to port the heads, and break into low 12's!!

mypontiac

I am pushing 343 RWHP with my 305.

I can make more power, but am told that my bottom end and pistons won't handle it.

Anyone pushing more HP with the stock bottom end and pistons on their 305????

Tim Burgess

484 hp.......

Here's some data for my '92 Z, which has the stock bottom end with > 160 K miles on it - a testament to Mobil 1 oil.....:

Peak rear wheel HP calculated from 1/4 mile mph:

Format:
(@ rear wheels / @ crank); [corrected data]

Normally aspirated: (310 / 365) hp; [(348 / 409) hp corrected]
NOS: (411 / 484) hp; [(429 / 505) hp corrected]

Peak rear wheel HP measured @ chassis dyno:

Normally aspirated: (312 / 367) hp; [( 326 / 383) hp corrected]


So, that would be approx 484 hp @ the crank (uncorrected), on the stock bottom end, with stock 305 ported heads.

Calcs:
peak hp @ wheels = wt[(mph/234)^3]
peak hp @ crank = peak hp @ wheels / 0.85

83 Crossfire TA

iTrader: (2)

that approximates peak HP at the crank assuming an optimized chassis for putting that power to the ground and roughly a 18% drivetrain loss.

PETE

iTrader: (1)

Also if you can put in a lockup switch to lock the converter when it hits second gear, you'll gaina tenth or two. When wide open you are running on a fluid coupling which wastes hp. Providing you have the gears to keep you in the meatiest part of your powerband or enough power(with n2o it sounds like you do) to minimize the gear factor locking the converter will produce a better timeslip.

However take into account that the single disc clutch TC isn't very sturdy and won't last forever doing this. Although adifferent engine than mine, the principal still is the same. If your converter has some decent mileage on it now it definately won't last long. If it's real bad you'll notice a shutter when it locks up.

mypontiac

Oh No Tim!!!!!

You are putting bad thoughts into my head.

Other than you, I have been told that 343 RWHP is the max I should go with my stock bottom end.

Of course, this is from people that do not run 305's!

I may be calling ATI and ordering the next smaller pulley!

Thanks!

SATURN5

Its all set... The Malibu goes to the track tomorrow.

Got a trailer set.. incase of problems.

Going to be interesting to see if the 305 holds together for a pass.. It should, maybe... lol

No drag radials or slicks available.. this will be on street radials.

Maybe.. just maybe.. a 12 sec time slip.

cheers, Bob W

mypontiac

Good luck.

Stock bottom end????

SATURN5

yup.. getting hit with 12 lbs boost.

mypontiac

I am running 10 # boost and am seeing 343 RWHP. I am expected to run in the 12's.

Am planning on going to the next smaller pulley.

What size do you have??? Running D-1SC???

SATURN5

Me?? Naw... Twin Eatons...

mypontiac

Explain in detail!!!!

SATURN5

Basically I adapted 2 Eaton M90's from a 89-93 Supercoupe. Mike Sitar did this with his T-bird a while back and I copied over to a TPI. Basically bolted 2 plates to the accessory brackets and braces to the rear of the blowers to the headers/intake.


Also have 2 Saab 900 intercoolers mounted ahead of the radiator, I need to take new pics, I cut a hole in the bumper to allow more air in, and replaced all the connections with turbo hose. Also rerouted the belt by adding 2 more pullys for more wrap around the blowers. Now have over 2/3's of the blower pullys wrapped. New belt is 111"...

mypontiac

Where do they push the air too???

I see the Chrome intake to the TB???

SATURN5

Air enters the rear of the blowers, and out the top. Out to the intercoolers, then Y's to the TB. A bov is mounted under there.

My camera is DOA atm, or I would take better/newer pics. I had some, but my scuzzy HD took a dump yesterday..