[Cobra GT]

I am fixing to buy a Kenne Bell 2.1 L blower for my 97 Cobra, and am looking for anybody who has or has had this blower on there car. I am wondering about the particulars of set ups. E.g. what tune to use Kenne Bell’s chip or have it costumed tuned, Boost- a-pump from KB or Walbro pump, what size MAF, what size injectors are you running? Fuel management, KB FMU, Spark, Boost-a-spark and the way KB says to set your car up. On there website they pretty much say leave the tuning to them with there blower and I kind of agree with them due to the quality of testing equipment they use in there R&D when they create these tunes. Far better metering and deal with a lot more parameters than the local tuner that just tweaks timing curves and things of that nature. I have the usual mods, long tube Kooks headers 1 ¾ to 3in collector, 3 in Kooks off road X-pipe, MagnaFlow exhaust w/ no cats, JLT cai, March udp’s, and a X-Cal 3 w/ a custom tune and 410 gears and other stuff. Can anybody give me some insight on this car and blower, thanks in advance? Please feel free to chime in I know this is a broad subject but any insight will help, thanks.

[majorownage]

Originally Posted by Cobra GT I am fixing to buy a Kenne Bell 2.1 L blower for my 97 Cobra, and am looking for anybody who has or has had this blower on there car. I am wondering about the particulars of set ups. E.g. what tune to use Kenne Bell’s chip or have it costumed tuned, Boost- a-pump from KB or Walbro pump, what size MAF, what size injectors are you running? Fuel management, KB FMU, Spark, Boost-a-spark and the way KB says to set your car up. On there website they pretty much say leave the tuning to them with there blower and I kind of agree with them due to the quality of testing equipment they use in there R&D when they create these tunes. Far better metering and deal with a lot more parameters than the local tuner that just tweaks timing curves and things of that nature. I have the usual mods, long tube Kooks headers 1 ¾ to 3in collector, 3 in Kooks off road X-pipe, MagnaFlow exhaust w/ no cats, JLT cai, March udp’s, and a X-Cal 3 w/ a custom tune and 410 gears and other stuff. Can anybody give me some insight on this car and blower, thanks in advance? Please feel free to chime in I know this is a broad subject but any insight will help, thanks.

dont buy a kb..

[Cobra GT]

why????

[majorownage]

Originally Posted by Cobra GT why????

too high compression
*maybe* 6-7 pounds (why spend almost 3k on 100ish horses?)

and im 98% sure nobody makes an intake for b headed cobras.


you are dead set on supercharging a stock block, get a procharger

[futureMACH1racer]

Originally Posted by majorownage too high compression *maybe* 6-7 pounds (why spend almost 3k on 100ish horses?) and im 98% sure nobody makes an intake for b headed cobras. you are dead set on supercharging a stock block, get a procharger

Do you have anymore evidence to support your statement? It seems like a pretty opinionated one at that.

[XectriK]

Originally Posted by majorownage too high compression *maybe* 6-7 pounds (why spend almost 3k on 100ish horses?) and im 98% sure nobody makes an intake for b headed cobras. you are dead set on supercharging a stock block, get a procharger

The KB replaces the intake...

What my recommendation on the tune is this. Use the KB tune and then drive it to a dyno so they can run some diagnostics on it. They might be able to get a few more ponies out of it but the KB tune is pretty solid. I don't know what the compression ratio is on a 97 cobra but if you run longtubes that lowers the boost by about 1 psi. Remember that when choosing your boost. You won't need boost-a-spark unless your going over 10psi (which is what KB recommends). You'll also be fine with just the KB BAP. Unless you're planning something crazy.

With any supercharger your UDPs will be useless.

[majorownage]

Originally Posted by futureMACH1racer Do you have anymore evidence to support your statement? It seems like a pretty opinionated one at that.

incorrect.

Sean Hyland agrees too

A 97 cobra has a compression ratio around 9.8;1

KB's make boost from low to high rpm, and this is bad with high compression.

Anything over 6-7 pounds and you will have major detonation problems below 3k ish rpms.

The only way to solve this would be to run race fuel, or ethanol.

Centrifigual s/c's only make boost at higher rpms.

[Baddbullitt]

My KB kicks ass. I run 10 pounds, Intercooled, with the boost a pump. No issues..
I didn't get the tune that it came with, I got an SCT instead when I got her dyno tuned..
Only reason why was cause they short shipped the damn thing... But I probably would have gotten the SCT anyway, but there's nothing wrong with the KB chips!! Just make sure the car gets put on a dyno to tune it properly..

[majorownage]

Originally Posted by XectriK The KB replaces the intake... What my recommendation on the tune is this. Use the KB tune and then drive it to a dyno so they can run some diagnostics on it. They might be able to get a few more ponies out of it but the KB tune is pretty solid. I don't know what the compression ratio is on a 97 cobra but if you run longtubes that lowers the boost by about 1 psi. Remember that when choosing your boost. You won't need boost-a-spark unless your going over 10psi (which is what KB recommends). You'll also be fine with just the KB BAP. Unless you're planning something crazy. With any supercharger your UDPs will be useless.

the long tubes help evacuation of the cylinders, letting more fresh air fuel mixture in.

Theoretically, it would actually detonate more because you have more of a charge in the cylinders.

stock manifolds act like a passive egr

but then you also have to factor in a cooler charge tempreture because of the lower boost pressure.

It would be interesting dynoing for these factors...

[majorownage]

Originally Posted by Baddbullitt My KB kicks ass. I run 10 pounds, Intercooled, with the boost a pump. No issues.. I didn't get the tune that it came with, I got an SCT instead when I got her dyno tuned.. Only reason why was cause they short shipped the damn thing... But I probably would have gotten the SCT anyway, but there's nothing wrong with the KB chips!! Just make sure the car gets put on a dyno to tune it properly..

btw do you have your bullitt intake?

Interested )))

[Scott2001GT]

People boost KB's on Mach 1 and thats a 10.1:1 CR...so you can do it on a Cobra. Just get the intercooled version.

[majorownage]

Originally Posted by Scott2001GT People boost KB's on Mach 1 and thats a 10.1:1 CR...so you can do it on a Cobra. Just get the intercooled version.

doesn't mean it's an efficient way for more power.

yes, it will be better with an i/c, but it will severely be limited by the compression ratio.

[Scott2001GT]

yes true..but higher compression is actually good. Just the stock internals are to weak for it. With the higher compression you can make more power and less psi and have a better throttle response.

[majorownage]

Originally Posted by Scott2001GT yes true..but higher compression is actually good. Just the stock internals are to weak for it. With the higher compression you can make more power and less psi and have a better throttle response.

Actually with pump gas, you will not make more horsepower with higher compression.

To run higher boost with high compression, you gotta have e85 or race fuel.


You most defiantly will hit detonation before you endanger your bottom end with pump gas.

[Scott2001GT]

i know you need higher octane with the CR being higher.

Timing is also a big factor in that

[Baddbullitt]

Originally Posted by majorownage btw do you have your bullitt intake? Interested )))

Of course I have my Bullitt intake!! Unfortunately it's promised to someone

[Trick Tuners]

Originally Posted by majorownage Actually with pump gas, you will not make more horsepower with higher compression. To run higher boost with high compression, you gotta have e85 or race fuel. You most defiantly will hit detonation before you endanger your bottom end with pump gas.

You seem to be forgetting timings role in detonation. I agree with your statements, but you can reduce the timing and it will not be an issue at low boost (<10psi). Then if you put in some race gas it will make tons of power!

[TRMach1]

You can run 8-10psi on either an intercooled Eaton or twin screw blower on a stock 10.1:1cr Mach 1 bottom end without any issues, provided the tune is dead on. And by that, I mean pulling about 17-18 degrees of timing, and an A/F ratio of 11.5.

To be on topic, I wasn't aware KB even made an intercooled 2.1 for the '97 Cobra, but I guess I never really looked for one. I wouldn't use a KB tune for anything more than starting up the car to get it to a dyno for a proper tune!

[futureMACH1racer]

Originally Posted by majorownage incorrect. Sean Hyland agrees too A 97 cobra has a compression ratio around 9.8;1 KB's make boost from low to high rpm, and this is bad with high compression. Anything over 6-7 pounds and you will have major detonation problems below 3k ish rpms. The only way to solve this would be to run race fuel, or ethanol. Centrifigual s/c's only make boost at higher rpms.

I'm incorrect by asking for evidence to what you have said?

I was correct by saying what I have said. Sean Hyland is not the end all be all for Modular engines. Just because he believes something doesn't mean it's the only way.

[Cobra GT]

There is no inter cooler for the new 2.1L KB, I think the 1.7L or the 1.5L (older kits) had i/c set ups. I am running 6-7 psi of boost with 93 or better octane and will be fine. I will update my custom tune after the s/c install. If I had a totally stock motor and no other mods I would fell safe using there tune, but would do some pull just to see the numbers. I am going to run 42# injectors, 90mm MAF, KB’s FMU & Boost-a-pump, Walbro 255lph fuel pimp, I don’t think it will be starving for fuel. I will get a custom tune with wideband I will post some numbers after it is done, thanks fellas.