Kinsler Manifold
Discussion
Hi Lee,
Just wondering how you have setup for light throttle openings? As I expected, mine is very "snappy" and driving at a constant speed i.e. light throttle is difficult. I have also been getting backfiring out of the trumpets at light throttle. It looks and sounds great, but it will be no good if it sets fire to my air filter!
I've just ordered a vacuum gauge so I can try re-sync the throttles. Was also thinking of getting a progressive throttle linkage as another issue I have is that the accelerator pedal is too high. It's also very heavy.
Did you have similar issues? If so how did you fix?
Cheers
Mart
Just wondering how you have setup for light throttle openings? As I expected, mine is very "snappy" and driving at a constant speed i.e. light throttle is difficult. I have also been getting backfiring out of the trumpets at light throttle. It looks and sounds great, but it will be no good if it sets fire to my air filter!
I've just ordered a vacuum gauge so I can try re-sync the throttles. Was also thinking of getting a progressive throttle linkage as another issue I have is that the accelerator pedal is too high. It's also very heavy.
Did you have similar issues? If so how did you fix?
Cheers
Mart
mike the part number would change based on the size of the inlets, they have two or three sizes for the LS and it would change dependent on which LS. Overall the drivability of this system has been excellent. BUT I must say that two issues have pissed me off number one the the mechanical TPS originally delivered with the system was problematic in way to short a time the sensor would wear out in the 4 to 6% throttle position causing low speed drivability issues. This has been cured by a optical sensor from Giles and Penny, Aerospace stuff that I have seen in helicopter applications before. When you admit to your customer that what you sold him was not up to the job and then you charge full pop for the correct answer I am not happy. The second issue was a worn bushing on the throttle shaft this occurred after less than 20,000 miles and cost $1800 to repair. Again no real concern about gee wiz maybe we should meet the customer 1/2 way that's not a lot of miles for this issue. I would still go for the I.R. type manifold horsepower,the looks, the sound its just a cool deal. But I would look at Harrop out of Australia and Borla in detail see if they have bushings or bearings on the throttle shafts what kind of TPS they use and take a hard look at how well their linkage is constructed. Most people get intimated by the need to sync the throttle bodies honestly with the right tool which is not exspensive that's really a non issue. Lee
What I can add to your data base is I have no problems at all with low speed when the system is correct. I did have problems with this engine surging at slow speeds with the original Fast intake with the L.S. series Motec. I changed both of these at the same time to the Kinsler and a Motec 800 slow speed surge gone completely. Problem is I can,t tell you which or if both fixed the problem. My engine builder is of the opinion that it was the Fast manifold that was mostly to blame. I would endeavor to do the following to your Kinsler system. First install a 02 sensor on each bank with the ability to monitor both at the same time. Take a long look at your linkage, measure the length of the corresponding linkage rods from each side they need to be exactly the same length. the lever arms need to pass thorough the 90 degree point at midway through their travel. Kinsler makes a progressive link for its throttle control which I bought but found I did not need once I changed to the latter set up. Once you have the linkage set up correctly you need a good sink tool I hope that's what you meant when you said you where getting a vacuum gauge. Sync the bodies you should be able to get within 1/2 to 3/4 of a single number. Then look at your A/F ratio from side to side. The motec reads in percentage of lambda which is 14.7 to 1 we shot for a lambda of .93 which is 13.6to 1 ratio from side to side we are within .060 I hope to improve this number with some ongoing adjustments to the linkage that we are doing now, but its well within the value it needs to be to attain great drivability. As for your current drivability problem I would take a hard look at your TPS output. If you see non linear output of the TPS as you move the throttle open you probably have your culprit. If its a mechanical sensor I would change it to an optic system. No, I do not have a problem with backfires or heavy throttle. My question on that is it hysteresis issues rather than A heavy pedal and is this contributing to your low speed issues. Lee
Ha: This is the second or third best use of panty hose that I have encountered. Must say my lovely wife was a little UM............ less than amused with my raid on her closet. Anyway stuffed some hand balls down the legs captured each side of the ball with a tie wrap and now I have a device to put in place when I am showing the car at a car show so some little rat b
d kid doesn't throw some gum down the inlet. Lee 
d kid doesn't throw some gum down the inlet. Lee ROWDYRENAULT said:
Ha: This is the second or third best use of panty hose that I have encountered. Must say my lovely wife was a little UM............ less than amused with my raid on her closet. Anyway stuffed some hand balls down the legs captured each side of the ball with a tie wrap and now I have a device to put in place when I am showing the car at a car show so some little rat bd kid doesn't throw some gum down the inlet. Lee
What about sink plugs linked with a chain, or some tennis balls perhaps? I recall race teams using these when the engine was not running...d kid doesn't throw some gum down the inlet. Lee 
Hi Lee, many thanks for the info. I'm going to investigate the potentiometer. I forgot that I used to have loads of issues the same as yours with my TVR pots. As soon as the engine got to temp they used to jump around. Time to get the laptop out!
I also use Penny & Giles pots at work. Not cheap, but they are flight standard and the best you can get... Also bought a vacuum gauge this weekend, so I'll have a check on the balancing as soon as I get chance. Bad news with the spindle bearing wear. I can't believe they worn that much in 20000 miles! I'll have to keep an eye on mine.
I'm encouraged that you managed to get smooth running with the same setup. I'm like you, I just love the sound and performance you get with the kinslers. Yes, I'll spend most of my time adjusting them, but to hear a 7 litre V8 rev and pick up like a motorbike engine is just awesome!
Cheers! Thanks for the info. You motor looks superb. Mart
I also use Penny & Giles pots at work. Not cheap, but they are flight standard and the best you can get... Also bought a vacuum gauge this weekend, so I'll have a check on the balancing as soon as I get chance. Bad news with the spindle bearing wear. I can't believe they worn that much in 20000 miles! I'll have to keep an eye on mine.
I'm encouraged that you managed to get smooth running with the same setup. I'm like you, I just love the sound and performance you get with the kinslers. Yes, I'll spend most of my time adjusting them, but to hear a 7 litre V8 rev and pick up like a motorbike engine is just awesome!
Cheers! Thanks for the info. You motor looks superb. Mart
Hi guys I posted a new video of the 8 into 1 headers on u tube look up " audio new headers lee benson" The bouncing idle that you will hear has been corrected. We needed to add some a little timing under the idle PRM. As the load pulled the RPM below idle it would cycle between trying to maintain idle and trying to quit. Problem solved. I still want to post some good quality drive by and in car stuff. Lee
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