so I have blown engine No#5 in 9 years - rebuild time again!
07-13-08, 11:28 PM
#1
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so I have blown engine No#5 in 9 years - rebuild time again!
Ok so here is the scenario:
over the past 9 years I have owned 3 road going RX7's one FC turbo and 2 FD's. My FC was cool and fast and I blew the engine after performing some minor mods and I had it rebuilt by a local guy who knows his ****! That engine was strong and I never had an issue with it, then enters FD No. 1
This was a car that I purchased off a guy that had taken the original engine out and replaced it with an old school front mounted 13B Monster Port engine from a stock car. I got this engine running in my car and sold it to buy a running stocker. this engine, was my first second hand one, I was 21 and had no cash at the time so it was my only option. This engine lasted me a year and I bet every car I raced and it blew while beating a V8! so rebuild time, I got the funds and we pulled it down go tit all checked and my mate built it for me. Problem here was that we didnt know it was a bad idea to skim the end plates on an FD - the engine lasted 3 months! 1 year later I had it shipped up to Auckland to be rebuilt by a **** company called M's Racing they basically fucked me, I turned up and the car didnt have any boost (ooh yay) so I drove it to Taupo (3 hrs away) and my friend found it had a split intercooler pipe, we fixed it and ooh goody I had 5psi boost on first turbo only! this was the start of my issues. I had also found that it was detonating in 5th gear under light acceleration, we changed the fuel maps on the PFC to a well know reliable one and it started detonating in 1st gear at 2000rpm!! so we quickly changed it back. Later I was told to check my lead configuration, turns out the idiots at M's Racing had put myleads around the wrong way, amazingly it still ran!. This engine NEVER ran right from the word go and they didnt want to know about it, and wouldnt fix it, funnily enough they went into liquidation a few years back. the third engine for this car blew when I was in a music video clip, 3rd gear static skid and pop! I fixed her up and sold her 6 months later, best thing I ever did!
FD no. 2 I purchased this one as a wreck and I have spent the last year building it up. Now with this car I had a decent amount of cash to spend so I pretty much only bought the best for it along the way. Apart from the engine, again i purchased an import engine with unknown km's and history it ran fine, tuned the pfc and it drove very hard! I took it on its first road trip to Wellington (about 750kms away) and it went fine until I had to put 91 octane fuel in it then it started running a bit rougher. I wanted to get rid of the gas as I normally only use 98 octane so I was driving around, went to my family thing and on the way home i put it in third on the motorway, applied the gas and BANG, down to one rotor!
The seal lunched the rear half of the engine, destroyed a rotor and both other seals ooh yay for me. So currently my car is about 700kms away in my mates garage with no engine in it.
I am in two minds about the rebuild I am going to do, one is to keep it stock internally and the other is to go bridgeported. Currently running PFC, 3" exhaust all the way through, Apexi filter pipes, HKS filters, ARC SMIC and HKS BOV. so what way should I go?? oh and sorry for the novel!
over the past 9 years I have owned 3 road going RX7's one FC turbo and 2 FD's. My FC was cool and fast and I blew the engine after performing some minor mods and I had it rebuilt by a local guy who knows his ****! That engine was strong and I never had an issue with it, then enters FD No. 1
This was a car that I purchased off a guy that had taken the original engine out and replaced it with an old school front mounted 13B Monster Port engine from a stock car. I got this engine running in my car and sold it to buy a running stocker. this engine, was my first second hand one, I was 21 and had no cash at the time so it was my only option. This engine lasted me a year and I bet every car I raced and it blew while beating a V8! so rebuild time, I got the funds and we pulled it down go tit all checked and my mate built it for me. Problem here was that we didnt know it was a bad idea to skim the end plates on an FD - the engine lasted 3 months! 1 year later I had it shipped up to Auckland to be rebuilt by a **** company called M's Racing they basically fucked me, I turned up and the car didnt have any boost (ooh yay) so I drove it to Taupo (3 hrs away) and my friend found it had a split intercooler pipe, we fixed it and ooh goody I had 5psi boost on first turbo only! this was the start of my issues. I had also found that it was detonating in 5th gear under light acceleration, we changed the fuel maps on the PFC to a well know reliable one and it started detonating in 1st gear at 2000rpm!! so we quickly changed it back. Later I was told to check my lead configuration, turns out the idiots at M's Racing had put myleads around the wrong way, amazingly it still ran!. This engine NEVER ran right from the word go and they didnt want to know about it, and wouldnt fix it, funnily enough they went into liquidation a few years back. the third engine for this car blew when I was in a music video clip, 3rd gear static skid and pop! I fixed her up and sold her 6 months later, best thing I ever did!
FD no. 2 I purchased this one as a wreck and I have spent the last year building it up. Now with this car I had a decent amount of cash to spend so I pretty much only bought the best for it along the way. Apart from the engine, again i purchased an import engine with unknown km's and history it ran fine, tuned the pfc and it drove very hard! I took it on its first road trip to Wellington (about 750kms away) and it went fine until I had to put 91 octane fuel in it then it started running a bit rougher. I wanted to get rid of the gas as I normally only use 98 octane so I was driving around, went to my family thing and on the way home i put it in third on the motorway, applied the gas and BANG, down to one rotor!
The seal lunched the rear half of the engine, destroyed a rotor and both other seals ooh yay for me. So currently my car is about 700kms away in my mates garage with no engine in it.
I am in two minds about the rebuild I am going to do, one is to keep it stock internally and the other is to go bridgeported. Currently running PFC, 3" exhaust all the way through, Apexi filter pipes, HKS filters, ARC SMIC and HKS BOV. so what way should I go?? oh and sorry for the novel!
07-14-08, 12:13 AM
#3
Senior Member
Thread Starter
My plan is to sell it soon after but enjoy it for a month or two, at least run the engine in properly so I know it wont come back on me after it is sold. Just with the whole bridgeport thing, I am thinking it may be harder to sell due to the current fuel prices, but then it may be easier to sell due to it being an FD with a bridgy pulsing away!
07-14-08, 01:47 AM
#5
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Thread Starter
**** I thought my track record was bad but DAMN!!! Part of my problem was that I never really had the money to do it properly but now that I do I intend on getting my rotors slotted to 3mm, well one is already slotted so naturally.... I will also be getting the engine balanced so I know everything will be in sync and working/spinning properly. The guy that will be building it has a 750HP bridgeport FD which he built himself but he has made it a T70 single turbo now (did have 2X Garrett GT35/40's strapped on to it) as it was pretty much undrivable! He is happy to do a bridgeport but suggests I go single turbo which is more $$. I will only be Bridging the primaries for the idle so it wont chew through so much gas. My other mate has an FD with a 13B bridgeport and GT35/40 making 400KW at the wheels! If only i had THAT much spare $$.
07-14-08, 02:06 AM
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and it went fine until I had to put 91 octane fuel in it then it started running a bit rougher. I wanted to get rid of the gas as I normally only use 98 octane so I was driving around, went to my family thing and on the way home i put it in third on the motorway, applied the gas and BANG, down to one rotor!
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07-14-08, 02:17 AM
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In the US our gas is rated as (RON+MON)/2, making your 91 octane similar to our 87.
I once accidentally put a full tank of 87 octane in my car when I was tuned for 91.
As soon as the car was in boost under load, both rotors went and that's only 4 points difference.
A pretty sure way to kill an engine is to tune it slightly close to the edge and then drop the octane 7 points.
I once accidentally put a full tank of 87 octane in my car when I was tuned for 91.
As soon as the car was in boost under load, both rotors went and that's only 4 points difference.
A pretty sure way to kill an engine is to tune it slightly close to the edge and then drop the octane 7 points.
07-14-08, 04:06 AM
#10
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07-14-08, 07:11 AM
#11
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.
and I'd still think about instead of 14 engines like that. You really lost 14 of them?
07-14-08, 04:51 PM
#14
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I know keeping the twins wouldnt be ideal for a bridgy so maybe I should just do a stage 2 (streetport) port on the motor as I know this works pretty well also. The idea for this car was to sell it so I dont want to go and spend massive amounts on something I want to sell so a single turbo at this stage is out of the question.
07-14-08, 06:10 PM
#16
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Research what you plan on doing BEFORE you do it. Know what you are getting into, and what is required. Make sure ALL your "power" mods are balanced and supported.
07-14-08, 07:39 PM
#17
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yeah what he said, I just used the wrong gas and BANG!!!!!
07-16-08, 10:04 AM
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