15.6\'s 12 attempts at 1/4. I need advice!

[dbdragger]

I had 12 passes on Friday. Ranged from 16.0 to 15.6\'s



Engine - 350 bored to 357 Tuned Port Injection (see Profile)

Edelbrock RPM Performer Heads

1.6 RR, Stock cam, BBK 52mm throttle body

1.5/8 exhaust , flowmaster 50 series x2

24 lbs injectors.



I had the computer reprogrammed 1 month ago and everything seemed to run pretty good. But all the other TA, mustangs, Camaro\'s were cruising right past me down the strip at 14.5\'s



I keep hearing that I should be in the low 14\'s, but I couldn\'t pull that off with my motor, not even close.



ANy suggestions. Thanks

[grimpuppy]

Let us have some info from the time slips. What\'s your 60\' time and 1/8 e.t. and mph and 1/4 mph I would think a tuned port could turn 14\'s in an S-10 without much effort. What gears you running in the rear and what tranny?

[grimpuppy]

P.S. I see in your pictures you started off with a 305. Did you change the injectors when you upgraded to the 350?

[dbdragger]

1) reaction - .152

60\' - 2.506

E.T. - 15.658

MPH - 88.450



2) reaction - .098

60\' - 2.483

E.T. - 15.743

MPH - 87.403



I should taken more notes on each individual race but after 4000 rpm I lost lots of power. I felt that the tires may have been spinning a litlle much but I was getting better as the night went on. My ET\'s weren;t but my 60\" best was - 2.369

[dbdragger]

3.42 posi with the T-5 trans out of a v8 camaro

[dbdragger]

injector went to 24 lbs, new from five o motorsports. that is when I reprogrammed the comp.

[rayL]

chunk that TPI in the trash if your wanting to go fast. was you spinning from the start cause your 60 foot times are on par with my wifes power stroke excursion. i dont know that much about the TPI stuff so maybe someone else can be more hepful

[ZZ4Blazer]

Somethings seriously wrong there. Thats bolt on 4.3 times there.

[Truckman91]

after 4000 rpm I lost lots of power.



Thats because the design of the TPI is make low rpm torque. What were you shifting at?



My 100% stock TPI 350 ran the fastest if I left the trans in drive and took off from idle. This was in my Formula Firebird and It ran consistant 14.40 with a quickest of 14.25.



Im willing to bet if you went back again ans shifted at better points, your times would improve nicely. But like said before, its the TPI thats holding you back.



Goto www.thirdgen.org (http://www.thirdgen.org) and seach the TPI forum. If you happen to post, remember that your engine in in a \"Camaro\" not your S-10.



Then goto www.stealthram.com/ (http://www.stealthram.com/) and check out the intake, youll like it.



What cam are you running, who did your tune? How much experience do they have?

[tracker]

this should school you a little on the tpi. they have lots of good stuff there.



www.tpis.com (http://www.tpis.com)

[ZR1BLAZER]

i agree with tracker. TPIS. i had a stock 350 .030 over cast crank, rods and pistons. i was using the stock intake, runners, and ported plenum from tpis. a tpis 52mm TB, 1 1/2\" headers the same world products heads i have now (which was way to big) what you have is much better. 1.5 rockers 4 speed auto 3.73 open rear with street tires (skinny) i did use TPIS zz409 cam and their level V prom and Accel 24lbs injectors. best run ever 13.2 @ 97mph best 1/8 mile time 8.8. call tpis you wont regret it.

[macdaddydenton]

awesome times for an open rear and street tires

[riotpolice75]

what kinda tires you runnin? are you spinnin em off the line? for that matter are you getting off the line smooth? them injectors seem a little small for a 350. what kind of ignition are you runnin? whats your timing set at? what kind of clutch? etc.



theres definately something holding you back. its just a matter of figuring out what it is.







smith

[riotpolice75]

On 2005-07-31 00:23, dbdragger wrote:

I should taken more notes on each individual race but after 4000 rpm I lost lots of power.





id attribute that to the stock cam. mine falls flat on its face around 4000 - 4500.







smith

[ZR1BLAZER]

On 2005-08-01 04:56, macdaddydenton wrote:

awesome times for an open rear and street tires





yah and think about it. if i had the heads that dbdragger has and the proper springs for the roller cam and a 1.6 rocker arm and a few other odds and end i would have put that full interior 3750 pound 87 monte in the 12s??? call TPIS and spend the money. ditch that cam for sure thats one of your biggest problems. you will love the zz409 cam. and if you want even more power they do have bigger cams. as for what someone said here about throwing the TPI in the trash. HA a tuned port on a bone stock motor make roughly 50 less HP then an LT1 but about 50 more foot pound of torque. save some money or get a peice at a time. if you get their big mouth intake, larger runners, and ported plenum, with the right cam and you will be in the mid 12s. i bet my life on that. OH and a stock tuned port will easily rev to 5500. with the big mouth you can rev as high as 7000!! something to think about. i dont know next to anything about carbs but the chevy FI i have tattooed in my brain. good luck man and let me know what you do. also like riot said. where is your initail timing set?? even with a high performance motor and custom chip you shouldnt be higher then 6 degrees initial.

[dbdragger]

Here is what I have done the last few days.



Checked the compression- between 170 and 175 on all cylinders, I wanted to check the comp because I am burning oil but infact there is an oil leak on the block some where and I have to find it. The oil is not getting burnt in the motor.



Changed all and gapped spark plugs to 035.



Adjusted the timing - I can\'t get an accurate reading on my timing because the line on the balancer never lines up with the timing cover measurer. But, I did advance the timing say 10 degrees. and have gotten tons more power out of the motor.



I just kept turning the distributor until the detonation occured and then backed it off.

I think the timing was so low during my passes that I was around 200hp or less.



Solutions here - Timing, Plugs, ALSO CHECKED ALL THE WIRES AND THE NUMBER 1 WIRE WASN\'T WORKING (replaced that too).



Man I had a ton of problems. I hope things only get better from here.

[BrandOmatic]

huh.. 7 cylinders would do that.



if i\'m not mistaken, my 2.0L neon engine has a 49mm TB, and automatic\'s have a 52mm TB.. that\'s 2 liters, not 5.7.. how come sbc tpi engines don\'t come with a bigger throttle body? more air and fuel never hurts. i honestly don\'t know anything about it, just seems a little odd to me.

[dbdragger]

The largest TB for the TPI is a 58mm, most people won\'t use this because it suficates the engine with air and low fuel. Unless you have a 383 supercharged TPI.

[Generator]

Your 60\' time is a 1/2 sec high, You have to be spinning.

[wild85]

Here is what i think your whole problem is: TPI equals lots of off line torque, S10 means no traction with street tires which turns into alot of smoke. TPI\'s are not top end motors, so with all of this spinning, your top end is not strong enough to make up for your shitty traction. Which give you 15.6\'s in the quarter.



I have a 357 carbed engine with around 350hp and i can floor the piss out of it off the line, and the worst i can do is a 15.3 at 95mph. But then again because of traction, the best i can do is 14.31. But i can still trap 100\'s with 43 degrees of total timing, and a screwed up street avenger carb.



So get some good tires and i bet you run somewhere in the 14\'s at least.

[ZR1BLAZER]

On 2005-08-02 00:16, BrandOmatic wrote:

huh.. 7 cylinders would do that.



if i\'m not mistaken, my 2.0L neon engine has a 49mm TB, and automatic\'s have a 52mm TB.. that\'s 2 liters, not 5.7.. how come sbc tpi engines don\'t come with a bigger throttle body? more air and fuel never hurts. i honestly don\'t know anything about it, just seems a little odd to me.



stock TB on a SBC tuned port was 49mm as well, BUT its twin 49mm so 49mmx2 52mmx2 58mmx2 if you look at the face of the TB compared to a neon you will see what i am talking about. see the new ls1s and all have like 78mm but its a single hole not 2. http://www.s10v8.com/images/smilies/icon_wink.gif

[ZR1BLAZER]

your oil leak is coming from the rear pass side of the intake. climb under the truck and look at all the oil all over the starter. .035 is perfect for gap on the tuned port. what year block and crank? because 86 was an odd ball. also are you disconnecting the jumper line when you set the timing? because TDC will move around alot if your not. if you are then are you throwing any codes?? like maybe code 43? with the computerized motors you set the timing with the jumper line disconnected. as soon as you hook it back up you will see the timing advance itself. just a few suggestions.

[dbdragger]

I didn\'t consistantly disconnect the dist line. I just continued to adjust it a little at a time. Your saying, disconnect it everytime I change the timing?



I definitely need some decent tires, I am running on Kumho 245/45/17, lots of width but not lots of tread. A pair of race slicks would be nice.



The oil leak is now figured out. I have to pull the motor and replace the pan gasket. Lovely heh. Well now I can clean up the engine bay a little more.

[ZR1BLAZER]

yes everytime you set the timing you need to set it with the jumper line disconnected. then hook it back up when your done. now if you set it for total timing instead of initial then no you dont disconnect it. but still want to set it for no more then 35 36 degrees. also do you know what year block it is?

[dbdragger]

I bought the block on line. Its good from 86-95, vin numbers are TKI552457, or V0502TPD. I am not sure exactly.



I now Know the oil leaking problem, The oil pan gasket is cracked. Pulled the motor last night and it has tonnes of pressure stress cracks all around. I must have over tightened it. Well I should be replacing this today and playing with the timing all over again.

[ZR1BLAZER]

i know the 86 block for sure stock has a different timing tab then the older block. make sure your at trur TDC. on the older 350s the timing tab (stock) is more on the side of the timing cover where as the 86 i have outside right now the timing tab is almost on top of the timing cover. something to think about if you didnt 100% check TDC.