Are these going to be made fro the LT-4's?

 

Any updates????

 

Soon. The person has a low rpm miss he is working on. Also his distributor gear was about shot and had to be replaced. So some issues to work through.

One more thing a car with a set of Dyno Don headers went in for California smog and the technician ask about the headers and was told they were ceramic coated stockers with the shields removed. All went well from that stand point.

 

Should be the same as the LT1's. The exhausts aren't that different. Intakes are a different story.

 

Don is a one man show. He also builds engines, up grade breaks, transmissions, rear ends and chip burning (also his son Kevin91Z burns chips too)86-93 C4 and F-Bodies with a 165 and 7730 ECM. Just give him some time and be patient. When a car come into the shop he has to jump on it.

 

Got the ignition sorted out and the misfire taken care of. Had a bad ground to the ignition coil. Unfortunatly, the coil was the last thing we checked, and we checked everything. Just got smogged and I passed the visual inspection and the sniffer test. We will get to the Dyno next week after the holiday.
This will be the last run with the stock motor, in two weeks we start building a 355 with Dr. J hogged out heads and mega ported intake, runners, plenum and other go fast goodies. I'll post pictures of the complete build when we start. For the porting I'm stealing some build up technics from 1989TransAm and Dyno Don. Stay tuned.

 

Appreciate the dyno being done on a stock motor. My class of autocross BSP allows me to mod the intake and exhaust but I can't touch the heads (other than port matching if I wanted to) or inside of the motor. I can tune the chip, change the headers, play with the intake. Not sure if any of that would buy me as much as adding 315 tires. Seeing your results will be very helpful. 1990 Corvette

 

I'm interested in the numbers as well, I used c4 stock headers for my c3. Also interested in price, bolt on would be nice vs aftermarket shoties and a new y-pipe. I really don't want the torque from long tubes, but the stock c4 headers are leaving out a lot of power with my current setup.

 

Given the 3 months of silence I assume these failed to provide any performance advantage, or worse produced negative results?

 

Not the case...
I have been working on this:


It has taken up all my time.

 

I read this last night and couldn't stop thinking about your comment. I do realize that sometimes things don't come across well when typed rather than spoken, however - comments like this help no one. The L-98 is in serious need of help in this department and Don is putting a lot of his own time and money to create a product in an attempt to help the community. Even if it doesn't work out, you should respect the effort and the cost rather than "talk smack" without any information.

Don and 1989TransAm have both made a huge commitment to the TPI community and spent significant amounts oftheir own time and money to help us all. I would suggest that you spend some time on the thirdgen board to see the intake work that 1989TransAm has done. These two people together have done more for the TPI drivers than the entire aftermarket has done in the last decade. The only "new" TPI part I can think of in at least 10 years is the Vortec base - other than that, who is working on improvements for our cars?

Personally, I really like the C4 even though they ride rough and could use more power. Still, they are a great mix of old school (real muscle car) feel and modern technology. My C5 didn't have that "muscle" feel - it was a luxury car that performed well. Pointless comments just let vendors and people like Don and 1989TranAm know that we're not interested in their help. Please don't spoil things for the rest of us by assuming negative results. ANY car can be improved on above factory design, even the current ZR-1.

Our old C4's can use all the help they can get and I for one appreciate the work these guys have done for us.

 

Well said!

 

been checking for feedback myself

Still I assumed also on a all stock motor it would be a lose as with most headers it's better to be too small than too big.

But my motor isn't stock.

 

What kind of intake is that? FIRST?

 

Yes, that is a First intake.
We (Corvette40 & I) did a cam(XFI 268) Heads (Procomp ported) First intake &24# injectors. Due to the different plug angle on the heads, I had to make some revisions to the header design for plug clearance.

This car will be on the dyno in the next session, just not sure when that will be.

I'm with you on the heads, but due to the short block being built by someone else the fellow was limited to choices (needed 58 cc heads)

The heads were ported professionally by Dr. J's performance. (good Rep)

 

Wish the build was with better (reputation) heads and LT headers. OTOH, great numbers with Procomps and shorties could/would make a bigger statement.

I can't wait to see the results. But, I'm more interested for the forum to see what the FIRST can do.

I agree with Cuisinart, these headers (good shorties) do need to be made. CA and cities with inspections NEED an option for C4's.



And,,,,,BTW, this thread is a posterboy for why that 45-day rule needs to be changed.

45-days is too short. Not enough. Bad idea. And, I've PM'd the admins on this more than once.

Feel free to contact them on your own -- if you feel the same!!!



(FWIW, if they shut this down, start a new thread and link back to this thread in post #1)

 

what he said

 

I agree on the 45 day rule. WTF good is that rule anyway? Who is it helping? Not the forum. I saw a locked thread yesterday about seat belt repairs. It was brought back after 2-3mo's with a post that was incredibly great TECH on how to repair the thing, what parts to use, where to get them....good stuff. Locked.



^Best post I've read on this forum in a long time. WELL said. Thank you for taking to time to craft that and I feel the same. Props to Dyno Don, 1989TA, and Corvette40

 

Why 45 days, if nobody responds to a thread then it will fade away for lack of interest. Threads like this need to stay alive.

 

No smack, no disrespect just a statement which could easily be refuted if someone knew the details.

They were installed back on 12/17/11 per the thread, Back on 2/8/12 these were headed for the Dyno, Originally Posted by 1989TransAm View Post "We are waiting for one other person who is replacing their top end. Hopefully next week." some ignition issues to work then testing. Realize people are busy but given the fast pace the build and fitting, and installation took, the 3 month delay between 'they are ready for Dyno', and no comment seemed adequate to support the assessment that perhaps they weren't performing.

I am happy to see anyone trying to make parts for these things, especially if they can pass California smog.