motor blew..gonna rebuild
 

just blew my motor after only 12k on build now im gonna do it myself.who makes the best complete rebuild kits .also probally gonna go single,i was having boost issues w/the twins anyways.3mm or 2mm. any suggestions would be appreciated.thanks,cliff

Who rebuilt the current one?
There are several different kits available from Mazda, Rotary aviation, Atkins, Racing Beat, Etc etc.....

KD Rotary in PA.recomend any that you listed?thanks,cliff

What's your budget?

We use the Rotary Aviation kits unless our customers specify differently. Never have had a problem with their products.

Why did the engine go so early?

Do you have any more details on what caused the motor to blow so early?

no warrenty, does KD even do that anymore or if they ever did?

Tim

I used the full RA 2mm kit and its doing great, no hot or cold start issuses from the start, and i have about 9,000 hard miles on it now running around 13 to 14 psi for almost half the miles.

It would be a good idea to try to discover the cause of your engine failure. You don't want to drop in a new engine and blow it because some supporting system is causing the problem.

No rebuilder is going to warranty anything that's not an error from the rebuild process. i.e. if you are having boost problems and you over boost, it's not the rebuilder's fault even if the engine only has 2k on the rebuild.

Amen to that Mahjik, they shouldn't be, but I was just wondering if he had contacted Dave about the engine to hear his thought and also what went wrong...ie overboost, lean, sideseal issues etc.

Tim

dont know why it blew.still runs, but not pretty.its only running on the front rotor i believe.i hear a nice rummble in there.not an overboost issue ,i couldnt get over 6psi..im gonna yank it out and tear it down soon to see wuz going on in there.altho the engine only has 12k miles on it ,it was done like 5 years ago so i would not expect any kind of warranty. i had a great experience with dave at KD,but this build is mine this time.i cant see selling her for a measley $6 or 7k.im going single, f-it.. also ,how is the Gotham single turbo kit?and should i go 3mm? thanks,cliff

damn. sorry to hear that you blew your engine. and after only 12k miles.

What are your current mods? Because theres alot to going single.

PFC, IC, fuel system, ect. It all adds up real quick and before you know it your in the hole $10k. Atleast i know i ended up being that way and I wasnt even sinlge.

Not trying to be mean, but you really need to slow down. Here's my advice (and I've been there, just check out my thread: https://www.rx7club.com/3rd-generation-specific-1993-2002-16/when-engines-break-pics-411874/ ):

1. If you haven't compression tested the engine, do so.
2. If you are low on compression on one or both rotors, go ahead and pull it
3. See if you can determine WHY the engine failed (i.e. carbon build up, fuel problem, etc) so you don't have it happen again.

Once you evaluate the damage (what can be reused and what do you need to replace as far as engine internals), take a look at how much of a budget you are willing to use towards this project. Most of the time, rebuilding it yourself will cost more than paying someone to do it, so you need to see how much you are willing to spend, then see what you are planning to do with the car to see if that lines up with your budget.

Then you can start thinking about types of seals, rebuild kits, etc....

I've been there too...
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/electron-manipulation-336924/

Here's my view.

PFS built a motor for me...ported the intake and replaced blown water jackets. At 10k miles boosting 10psi, I take it to the dyno and the front rotor blows at 13psi with 11.9 A:F...

what do I find?
http://i7.photobucket.com/albums/y28...p/9ee22332.jpg

poorly installed injector insulator on the front primary injector...cause of death :scratch: could this cause a lean condition on the front rotor?? I have no idea.

Regardless...that was an expensive 10k mi trip.

What did I do?

I built my own 13B-DUB motor
I built my own single turbo kit
I built my own engine harness
I program/tuned a Haltech ECU

This cost the same as having a shop remove my engine, port the intake/replace coolant seals, and reinstall.

BUT, the car is faster, more reliable, unique, and I have more pride in the project.
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/i-wanted-copycat-agentspeed-show-some-pictures-467874/


ps...I just couldn't put this on a motor I just spent weeks prepping and building, air flow just looks painful?!?! That and the AWS really make me wonder :hahaha:
http://i7.photobucket.com/albums/y28...p/4c0d3707.jpg


PFS isn't the only shop I've had great experiences with :rolleyes:
http://i7.photobucket.com/albums/y28...p/cc3a6cf2.jpg

anyone guess where this box came from??? I've got stories about more shops that have let me down...are my expectations too high?? I don't think so.

I'll do anything and everything myself, I'm not afraid to learn...hell, I feel like I can do a better job than some of these jokers working at the "top" shops...can't say that it costs more either, like Mahjik has stated above.

When I say it can cost more, I'm referring to that not everyone "gets it right" the first time they rebuild one of these engine. Here's a good example (sorry Aeka):

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/rebuilt-engine-boat-anchor-pics-inside-466493/

The "pros" aren't paid the extra money because they are supernatural; they are paid to NOT make the mistakes with your engine that sometimes new engine rebuilders do. The money is really spent on experience, not really the work and the parts so much. For some people, rebuilding themselves can be profitable; for others, it's more expensive and time consuming (especially if they don't already have a garage setup/tools to do it).

As I always say to someone rebuilding their own engine for the first time; if you can't afford to do it twice, pay a pro to do it.

AHAHAHA!!! I like that quote much better!


but if they can't afford to pay twice, they can't pay a pro.

Sure they can. Kevin at RotaryResurrection does a great job without charging an arm and a leg. ;) There are a few others that don't charge Pettit/Pineapple prices.

However, I will say that we have about 5-6 Pettit motors in my area. All have been beat on for the last few years and no problems yet (one of them for over 5 years, 8 or more road racing events a year, trips the drag races, etc over 50k miles on it and still going strong but it was an expensive motor). If I were to pay for a rebuild, it would either be Kevin or Pettit at this point for me.

Bottom dollar for Kevin's rebuilds $1500 for basic rebuild (nothing broken), IIRC...maybe $250 shipping each way (I don't know never shipped a motor). $2000 for simple math.

Rebuild yourself (again nothing broken), $750 for ALL seals and gaskets...no shipping. You mess something up, another $100 for water jackets...everytihng else reusable. Twice by my math is less than half what the any builder might charge.

Of course, there are lots of what if's....I paid $200 for a housing and $100 for a rotor. I even had Rick Engman lap my irons, balance my assembly and micro-polish my e-shaft...Bryan at BNR port my housing ~$1500 invested in the short block at this point, still under what any shop will charge and they don't preform any of that work.

I'm not starting an arguement...just want people who want to rebuild there own engine to be aware of what is possible. If you can read and turn a wrench you can build. I'm definitely no genius, but I pay close attention to detail and I'm the slowest worker I know.