New times are in

[Jim_PA]

Best was 14.2 @ 93.5 60' on that run was 2.05 - The launches felt pretty solid, I was all-but dumping the clutch and smashing the skinny pedal from right around 3-3500 RPM's. I don't know if there is a whole lot of improvement in this area or not. I cut almost a full half second on my 60' from my previous best run of 14.4 @ 97.8. with a 2.5 sec. 60'. I was running 26X9 Hoosier slicks this time vs 295/50/15 radials last time. Tire diameter is virtually the same.

I was a little disappointed about the 4 MPH loss in trap speed, I was hoping that with a full magnaflow system, and some Tri-Y's I would have at least been at the same speed as before. Maybe my tuning was a little off.

I'd really like break that 13 second barrier. I think before I go again, I'd like to add in a wideband o2 system to try to make sure a tuning issue isn't in play. If that doesn't do it, then who knows what I'll do next. Was thinking electric fans, but I don't have the room, and really don't want to put forth the effort required to make that happen.

[Wild83C10]

There is definitely something wrong there. If you cut 1/2 second off of your 60' you should have dropped more then .2 off of your ET. You should have run like a 13.5 to 13.8.
I'm surprised you only ran a 2.05 60' with a slick. Did you spin? bog?
What's your fuel system? Total advance? How heavy is your truck?
I was running mid 13s with a 350 and a muncie M21 (2.20 first gear), drag radials and 3.90 rear gear. That was with a 2.0-2.1 60' with a 107 mph trap speed.

[Jim_PA]

Truck weighs about 4650 with me in it. The clutch may be the weak link, as I think it was slipping a little as I hammered it. Could be lack of experience too. No bog. Fuel system 3/8" Edelbrock street pump. Total advance was 37.5 deg. I should have backed it down to 36.

[383Ram]

Try backing the timing down some and check the plugs. You might be surprised that it may run faster with less timing. The MPH seems a tad low for the ET, it may be losing something on the top end.

Going to the track can be an act of fustration. The most fun i had was running a 18-19 sec car. I just got there when i did, and it was a blast watching people trying to catch me. Keep it fun, its what its all about.

[gchemist]

[QUOTE=Jim_PA;3323375]Truck weighs about 4650 with me in it. [QUOTE]

Wow, that's heavy. Can you loose a pounds?

[Jim_PA]

[quote=gchemist;3325734][QUOTE=Jim_PA;3323375]Truck weighs about 4650 with me in it.

Wow, that's heavy. Can you loose a pounds?

I weigh about 250, so yeah, I could stand to lose a few pounds.

Been thinking about making her a short bed.

[71chevytruckguy]

Originally Posted by Jim_PA

Truck weighs about 4650 with me in it. The clutch may be the weak link, as I think it was slipping a little as I hammered it. Could be lack of experience too. No bog. Fuel system 3/8" Edelbrock street pump. Total advance was 37.5 deg. I should have backed it down to 36.

As irconic as this sounds, a little clutch slip off the line is what you want with a 4-spd. This takes some of the shock off the drivetrain and allows the motor to stay in its power range while rest off the drive train catches ups. Chris.

[Jim_PA]

Originally Posted by 71chevytruckguy

As irconic as this sounds, a little clutch slip off the line is what you want with a 4-spd. This takes some of the shock off the drivetrain and allows the motor to stay in its power range while rest off the drive train catches ups. Chris.

I was definitely happy the clutch was slipping. It made everything feel like it was going to stay together

[Jim_PA]

Thinking about getting one of these http://www.ngk.com/afx/

$246.99 shipped on ebay. I guess the worst that can happen is I get it and find I'm pretty darn close.

[Jim_PA]

This looks even better. Can log RPM input to your data logger: http://www.14point7.com/Widebands/JA.../JAW_1_041.htm

[Wild83C10]

Never heard of either of those WB. I use the innovate, they have some good stuff and you can add on sensors. Of course it cost more. The AFR and RPM datalog is a nice feature, otherwise you are driving and trying to look at your O2 gauge.

[Marv D]

Ditto,, Innovate is what you want. You can log in your laptop, or any data logger. Just be aware,, data is just as addictive as the 'faster faster faster' thing. You start with logging wideband A/F ratios,, then next thing you know your selling plasma to buy oil temp sensors, driveshaft speed sensors,

BTW... The narrow band stuff is totally a waste of $'s IMO. Don't even think about it.

[Super73]

I have had 3 Innovate LC-1's and would never buy another one. Reason for 3 is the first one died, as did the second one and guess what, the third one is dead in my truck too. I would have to constantly do free air calibrations to keep them accurate (7 out of 10 times) and to get a reading out of them. The A to D's kept dying on them (They have 2 channels). I never did test the RS232 output as I was running the WB through HPtuners and my laptop.

When it did work, it was a great tool.

It seems a lot of people have had issues with the LC-1's but the LM-1's are solid pieces.

Agreed the Narrow bands are not worth your money.

[Marv D]

Interesting.. I'm running a LC-1 controlling WB 02 in each header of the Nova, and have had zero issues. Oh, wait, I take that back. One of the original LC-1's had a problem in it would cycle through the warmup over and over and sometimes lock in, sometimes not. Sent it in, they sent a new one and have not had any problem since. But your right, there was some issue on a board produced about a year or two ago. I heard that was all resolved and warranteed out, the new board is stable. But.. that's just what I've heard. Mine (after the initial replacement in 05) has been rock solid (knock on wood).

[Jim_PA]

I think I'm going to try the DIY for $80. If it sucks, It looks like I have a 60 day return, and the sensor used is the same as what's needed for the innovative.. So I can always return the DIY, and pick up the innovative without the sensor somewhere.

My main reason is that for $80, it will pick up RPM. I can see how it might be difficult to analyze your test runs without seeing the RPM associated with the A/F data.

Thanks for the info, I'll make a thread about it after I get it up and running.

[Wild83C10]

I haven't had my innovate for very long, no isues as of yet. A few of my friends have them and they haven't had any issues.
It does seem that there are a few people out there that have had problems from what I read, but I still decided to buy one.
Good luck with the DIY, but remember, sometimes you get what you pay for.

[Jim_PA]

Originally Posted by Wild83C10

Good luck with the DIY, but remember, sometimes you get what you pay for.

Yep Prepared for the worst, hoping for the best

[70rs/ss]

I have heard the tri-y's give up a little on the top end, as they are designed to build tq down low, they give up some on the top, what is your RPM going through the traps?

[Jim_PA]

About 4000 -- Last time, I was up around 4500.

[crossy]

i had mine doing 13.2's and people thought it was a dog, but they(car & S10 owners) don't realize what it is like trying to push the equivalant of a 4'x8' sheet of plywood down the track. the frontal area of a full size older truck is massive. the MPH on a truck will always be down a bit due to that so I advanced my cam 4* and built the engine to make bottom end power. My 60' was 1.85 with drag radials, that i had a hard time getting to hook, with only a 350. my engine is a stock block,(Absolutely no machining),stock bore 350 with GM closed chamber heads #041's, hydraulic 505 lift cam, performer RPM, Holley,out of the box, vacuum 750, and cheap, long tube headers with 40's and dumps bolted on.the engine only made 275HP to the rear wheels, but 415 torque! it weighs around 4200 with me in it.
There is a lot of E.T. in a QJ with proper jetting and rods changes just a bit harder to pinpoint than a holley. try a stock Holley vaccum 750 or DP 650 from someone just to see.
Oh, yeah i did have a 4.10 gear and 3000 stall. when it hooked my head would hit the back window! I broke the TH400 (Bad suspension issues set up by PO) before i had a chance to tune it into the 12's. crossy

[Jim_PA]

Originally Posted by crossy

i had mine doing 13.2's and people thought it was a dog, but they(car & S10 owners) don't realize what it is like trying to push the equivalant of a 4'x8' sheet of plywood down the track. the frontal area of a full size older truck is massive. the MPH on a truck will always be down a bit due to that so I advanced my cam 4* and built the engine to make bottom end power. My 60' was 1.85 with drag radials, that i had a hard time getting to hook, with only a 350. my engine is a stock block,(Absolutely no machining),stock bore 350 with GM closed chamber heads #041's, hydraulic 505 lift cam, performer RPM, Holley,out of the box, vacuum 750, and cheap, long tube headers with 40's and dumps bolted on.the engine only made 275HP to the rear wheels, but 415 torque! it weighs around 4200 with me in it.
There is a lot of E.T. in a QJ with proper jetting and rods changes just a bit harder to pinpoint than a holley. try a stock Holley vaccum 750 or DP 650 from someone just to see.
Oh, yeah i did have a 4.10 gear and 3000 stall. when it hooked my head would hit the back window! I broke the TH400 (Bad suspension issues set up by PO) before i had a chance to tune it into the 12's. crossy

I think a linelock would help me. I have a feeling I was starting to roll off the line before I was really getting the clutching/throttle going in full sync.

I'm hoping the wideband system will get any tuning issues out of the way, but the devil had tempted me to strap a holley on just to see what it would do

[Jim_PA]

Line lock ordered

[71chevytruckguy]

Originally Posted by Jim_PA

Line lock ordered

some of the best money you can spend with a manual. its so nice not having to worry about the brakes when your on the line and makes burnouts easier. another thing you might want to consider if your gonna do much bracket racing is a 2 step revlimiter. put the gas to the floor and it'll hold the engine at what ever rpm you want to leave at everytime, no tryin to watch the tree and the tach. Chris.