I CANT MAKE A DECISION!!! Jrsc or edelbrock.

[SPCorBUST]

Haven't been on here for a while but came to share my two cents.

I'm 4.5 years in on a 5.5-6 year old C30.

Rotrex units seem fine to me...

[marco1ca]

Originally Posted by casing

Well I made my decision. I went with edelbrock and I spun a main bearing after 200 kms.

Just wondering where you are today with this.. Did you figure out what happened? Was it Edelbrock, something else? curious, thanks

[ROFL it's Waffle]

Originally Posted by evoto86

Turbo

Do they make Turbo UEL headers? Thought they were all EL.

[Joveen]

Originally Posted by ROFL it's Waffle

Do they make Turbo UEL headers? Thought they were all EL.

JDL and Maperformance makes uel manifolds for turbo

Sent from my SM-N960U using Tapatalk

[casing]

I have not taken it apart yet. I just threw in a used engine and tried again. About 5000 kms put on the newused engine with boost. Seems to be good

[Matt@Cosworth]

Originally Posted by casing

Well I made my decision. I went with edelbrock and I spun a main bearing after 200 kms.

were you on 5W30 oil ? or the original 0W20?

[gtengr]

Originally Posted by mrg666

Do you know any such case of an incorrect installation leading to blown up engine with JRSC? Have you ever seen a failing Rotrex unit blowing the engine with it? Beyond wrong installation (assuming your statement is correct) a failed liquid-air intercooler can quite possibly mix coolant with air that goes into intake. Because of that, I would not choose a liquid-air intercooler. Rotrex is the safest supercharger to install on our cars and it puts the least strain on the engine due to lower torque at low rpm. When/if the Rotrex unit fails, it is extremely easy to replace. Oh I forgot to mention in my previous post, Rotrex superchargers give better fuel mileage than PDS units because they are more efficient. I have actually even better fuel consumption than stock with JRSC when driven normally.

OEM's use the Eaton (e.g. Audi S5 B8). How many OEM's use a centri?

Originally Posted by mrg666

I remember your posts before deciding on your supercharger. I hope you are still enjoying your decision. Why don't you just tell how you made your decision. That would be very helpful.

I made my decision based on the number of Rotrex replacements I've read about on this forum, and the fact that the Eaton-based blowers use an OEM quality charger. I was going to get the Edelbrock kit (was waiting on the 2017+ update at the time), but a used Cosworth popped up nearby so I just went with that. Actually glad I went Cosworth now due to the number of bypass valve issues with the Edelbrock.

[mrg666]

Originally Posted by gtengr

OEM's use the Eaton (e.g. Audi S5 B8). How many OEM's use a centri?

I made my decision based on the number of Rotrex replacements I've read about on this forum, and the fact that the Eaton-based blowers use an OEM quality charger. I was going to get the Edelbrock kit (was waiting on the 2017+ update at the time), but a used Cosworth popped up nearby so I just went with that. Actually glad I went Cosworth now due to the number of bypass valve issues with the Edelbrock.

I agree that PD compressors have been market preference since so many years. Buyers prefer/enjoy low-end torque for driving and, for FI applications, OEMs design their engines to be reliable with that low-end torque of PD compressors. Edelbrock kit is Roots compressor, and Roots is the earlier/inefficient design compared to later generation twin-screw (Sprintex) compressors.

But, let me remind that we are not discussing an OEM application here but aftermarket modification of an NA engine. Our FA20 engines are not designed for FI but for maximum NA output. Their 12.5 compression makes them even more vulnerable to FI.

JRSC is not that unpopular anyway but I did not base my technical decision on popularity. I chose Rotrex as the more reliable and efficient engineering application specific for our FA20s. I am referring to engine reliability here, not the compressor itself. Many here argue that PD compressors can probably be more reliable than Rotrex. Although my Rotrex is still working well, my initial thought was that Rotrex replacement is so much easier and cheaper compared to engine replacement. If it fails one day, I will just slap another even easier than spark plugs.

If you have missed that part of the thread, unfortunately, OP blew up the first engine with Edelbrock and he is with the second engine now.

[gtengr]

Originally Posted by mrg666

But, let me remind that we are not discussing an OEM application here but aftermarket modification of an NA engine. Our FA20 engines are not designed for FI but for maximum NA output. Their 12.5 compression makes them even more vulnerable to FI.

The point I was responding to was about charger failure, so it's relevant to point out which charger has OEM applications.

Originally Posted by mrg666

If you have missed that part of the thread, unfortunately, OP blew up the first engine with Edelbrock and he is with the second engine now.

I'm aware. Plenty of blown motors in the JR thread too. There is no 100% guarantee with any FI kit.

Edelbrock is confident enough to provide an engine warranty if certain conditions are met. That is sufficient for me, along with the other FI threads on here, to be confident I don't have to worry about a PD kit overstressing the engine significantly more than any other kit in this horsepower range.

[mrg666]

Originally Posted by gtengr

The point I was responding to was about charger failure, so it's relevant to point out which charger has OEM applications.



I'm aware. Plenty of blown motors in the JR thread too. There is no 100% guarantee with any FI kit.

Edelbrock is confident enough to provide an engine warranty if certain conditions are met. That is sufficient for me, along with the other FI threads on here, to be confident I don't have to worry about a PD kit overstressing the engine significantly more than any other kit in this horsepower range.

Good for you, have fun.

[bfrank1972]

Originally Posted by mrg666

Edelbrock kit is Roots compressor, and Roots is the earlier/inefficient design compared to later generation twin-screw (Sprintex) compressors.

Just thought I'd add, while roots type has historically been a less efficient design than twin screw, the Edelbrock (and Cosworth and Harrop) uses their TVS models, which is a highly optimized roots design that compares pretty favorably with modern twin screw designs when referring to efficiency (heat).

[mrg666]

Originally Posted by bfrank1972

Just thought I'd add, while roots type has historically been a less efficient design than twin screw, the Edelbrock (and Cosworth and Harrop) uses their TVS models, which is a highly optimized roots design that compares pretty favorably with modern twin screw designs when referring to efficiency (heat).

That doesn't change the fact that roots is the least efficient design compared to twin screw and Rotrex, especially at high rpm. I am pretty satisfied with Rotrex and I will stick with it.

[MadMoose]

Originally Posted by mrg666

That doesn't change the fact that roots is the least efficient design compared to twin screw and Rotrex, especially at high rpm. I am pretty satisfied with Rotrex and I will stick with it.

lol

[bfrank1972]

Originally Posted by mrg666

That doesn't change the fact that roots is the least efficient design compared to twin screw and Rotrex, especially at high rpm. I am pretty satisfied with Rotrex and I will stick with it.

Yup, have a Vortech centrifugal myself, was worried about the low end torque but it's actually quite entertaining when the rears break in 2nd as I pass 5500 rpm It's interesting Eaton produces both twin screw and the TVS blowers - inherently roots is less efficient, just thought I'd point out that optimization can go a long ways and the TVS units are pretty impressive! They still don't quite match a properly matched centrifugal in overall efficiency regarding both heat and engine load, but they do have that low end torque. Cheers, Brad