Edelbrock vs Jackson Racing

[ajc209]

We know the Edlebrock IAT sits about +30-35C above ambient from datalogs posted up, what is the JRSC like?

I would very much like to see some datalogs of IAT taken from a JRSC fitted car lapping a circuit.

I drove a car with HKS v1 and V2 SC kit before going with Cosworth. I just found the roots charger makes a lot more torque everywhere which I preferred.

[86 South Africa]

Originally Posted by clayrush

We went with edelbrock mainly because of my girlfriend's driving stile. Partly do to old habits and not wanting to hit redline and partly wanting to have nice low/mid power. It's very pleasing to just mash the gas in any gear at any speed and accelerate at a pace that puts a grin on your face. We did one track day with the car so far. We dont even come close to pushing it at our level. Other than dealing with some cold start issues on e85, in the short time we have had installed all has been well.

That being said. If the frs was my car I would have bought the Jackson kit. Because I feel it would match my stile a needs a bit more. I am currently working with my shop to build a custom rotrex supercharger system for my celica.

Nice,

I am looking at the edelbrock kit too (have been for some time) - I'm just getting shafted by our exchange rate (price gone us basically 25% for me!!!) - and still looking at engine reliability/considering the downsides.

However, the allure of more (easy) power is hard to resist

[Ashikabi]

I didn't read the whole thread but... I was recommended to the Edelbrock system by my tuner(very big name in the 86 community) over any other supercharger on the market(these guys don't retail so had no stake in making a sale). They said they were really impressed by it. I haven't gotten one as I decided on a turbo but that's what I've heard

[Lunatic]

Originally Posted by JGalp

@86fun


and this is with the CARB tune?? these two posts right here make me very worried..why isnt there any support from edelbrock or the shops you installed it at to fix these problems? or did you guys install it yourself. if i got it installed on mine i wo uld do it as CSG and they have said nothing but good things about both kits..i cant imagine david or mike not being able to help me if i install it with them.

CSG did my install. They also installed a Delicious Tuning e-85 Flex Fuel kit. Edelbrock won't give me any support because I did not use their tune. After sending several logs to Delicious Tuning they say it's not their tune, but the installation. I have a local tech here who thinks he's found the problem. I'll know more Thursday.

[Ashikabi]

Originally Posted by Lunatic

CSG did my install. They also installed a Delicious Tuning e-85 Flex Fuel kit. Edelbrock won't give me any support because I did not use their tune. After sending several logs to Delicious Tuning they say it's not their tune, but the installation. I have a local tech here who thinks he's found the problem. I'll know more Thursday.

Keep us updated

[Alltezza]

I'd say JRSC, as they're cheaper and output the same if not more power.

[menikmati]

Originally Posted by Alltezza

I'd say JRSC, as they're cheaper and output the same if not more power.

Edelbrock provides slightly more low-end torque while the JRSC excels at the top of the rev range, based on dyno graphs.

[ajc209]

I cant think of one OEM car manufacturer that uses Rotrex superchargers from the factory, but I can think of tons with an Eaton Supercharger. Namely Aston Martin, Jaguar, Mercedes, Audi......

[Sleepless]

Originally Posted by ajc209

I cant think of one OEM car manufacturer that uses Rotrex superchargers from the factory, but I can think of tons with an Eaton Supercharger. Namely Aston Martin, Jaguar, Mercedes, Audi......

That's primarily due the mid-range power provided by the Eaton style chargers since most people would feel/appreciate it. Centrifugal chargers like the Rotrex are best for track junkies.

[The Racers Line]

Originally Posted by 86fun

I have an edelbrock, and while I might be a special case (so I'm told) I've had problems with the kit, mostly with the provided tune, possibly more though. There is really no good reason for all the problems, my car was 100% stock and well taken care of and practically brand new (13k light miles). Even after lots and lots of time logging and playing with different tunes it's still got some funky quirks, and it has power loss just like a turbo when the outside temps are higher, very noticeable. I'm talking about using California 91 pump gas here, not flex fuel or 92/93 octane. It's been months and there is still no EO number for CARB, I'm wondering if it'll really happen. I do like the power when it's actually providing it, the power band great for DD, but for the money and hassle I think I wouldn't do it again. I have no idea about the JRSC, but I can't imagine it being worse. It seems all the people who stand to benefit from selling these kits are the ones saying it's great and there are no problems, I call BS personally. I've met enough people online and offline with many issues both different and similar to mine, so I can definitely say there is a lot of hype on here about how well the kits work in real life. I'm learning modifying your car is the same as it was 20 years ago, if you go messing with it then it's not going to be as smooth or reliable as OEM. YMMV, this was just my experience. Good Luck!

You failed to mention the most important aspect of your situation. You had an INSTALLATION issue too causing a lot of early issues.

Of course it is absolutely possible there is some kind of Ecutek or ECU software glitch isolated to just your car, but it is more than likely still a hardware issue.

I've got 4 Edelbrock kits on the road now, all running the CARB tune, and running flawlessly. They are 4 different year cars as well a 13' two 14's and a 15', with different ECU versions and different kit production dates. To this day, all of the issues I have seen with this kit on the forum, with people running the CARB tune, are installation errors.

[ZionsWrath]

If there is a large margin for error in installation might be enough to sway someone to another kit. And I think rightly so since a lot of people are DIY. And according to a bunch of posts i've read some have been installed "professionally" and some with issue from DIY have had no diagnosis success taking it to a shop. Just interesting information all around.

[ATL BRZ]

[ajc209]

Originally Posted by Sleepless

Centrifugal chargers like the Rotrex are best for track junkies.

You are probably right about the feel factor but I dont agree with the above comment.

If the charge cooling is good enough I don't seen any reason why centris are superior. In many ways the roots are better, as long as the cooling is up to scratch as they are a little less efficient.

1) Eaton TVS have a self contained gearbox with oil changed every 100k miles - no separate oil system to have to maintain or potential failure point.
2) They have more area under the curve - you can short shift and still have decent power

on the flip side
1) The centris typically use air-air coolers whereas roots/screw use air-water-air which is more complicated. Though if you spring a leak its not going to very quickly kill the SC like an oil leak on a centri system
2) Cheaper
3) Less stress on the engine at low revs.

Either way they have their pro's and Con's but I wouldn't suggest one is better than the other in a properly designed system, it more of a preference.

I was interested in the HKS before I drove a car with it fitted (twice). I just preferred the feel of the positive displacement powered cars. I went Cosworth because I wanted the lowest IATs possible, but the Edlebrock is also decent enough.

I'd always recommend Cossy because it comes with a properly developed tune, but then i'm biased

[continuecrushing]

both kits are pretty good, but two things are VERY important:

1. Proper install-don't just go to the cheapest shop.

2. Tune! Holy cow this is a big one...I'm personally running @DeliciousTuning ecutek tune with flex fuel-everything has been fantastic