180mph

[DR SCHNITZEL]

Hi all
 
I took my car to 180mph :Nono! the other day it ran fine and still had more to go, the boost was fine also and i have never had a boost problem in the past 1.5 years. the car ran fine on the way home too. The day after when i went for a drive and applying boost WOT it now doesnt hold at a constant .85 it goes .6 .7 .5 etc very erratically through the rev range. ive checked all my pipes and they seem ok. the vacuum holds a little less than it did at idle. it was at .5 now its a touch less.
 
What have i done? has anyone any ideas. im giving it a once over now hope i aint bust something expensive

[chrisJDM]

unless you have a highly modded FD mate then its very unlikely you will hit 180mph, if you are getting those readings from the standard speedo then these are definetly wrong, the standard speedo is way out at high speeds.  my FD is tuned still with standard turbos and i have had it go off the clock several times.  A standard FD with do about 155-160 max and it takes quite a bit to increase that to 180+

[DR SCHNITZEL]

I have just under 400hp at the fly. my standard one used to hit about 160 on the clock, and this felt well quicker, anyway i digress. I need to sort this boost problem out. My plan of action is
a) check to see if ive hurt my plugs
b) check my turbo hoses replace with blue silicone.
 
Just off topic again. what is the road speed with 17inch wheels with 50profile tyres in 5th gear at 7600rpm? thats prob more like my true speed.

[silverrexman]

:rollin :rollin

Hi all
 
I took my car to 180mph :Nono! the other day it ran fine and still had more to go, the boost was fine also and i have never had a boost problem in the past 1.5 years. the car ran fine on the way home too. The day after when i went for a drive and applying boost WOT it now doesnt hold at a constant .85 it goes .6 .7 .5 etc very erratically through the rev range. ive checked all my pipes and they seem ok. the vacuum holds a little less than it did at idle. it was at .5 now its a touch less.
 
What have i done? has anyone any ideas. im giving it a once over now hope i aint bust something expensive

:rollin :rollin :rollin 180mph,:rollin :rollin :rollin .85 boost,:rollin :rollin :rollin ,more to come:rollin :rollin :rollin ,thanks you have just made my day:cheers

[AshRX]

Mate im runnnig a T51r 1/2 bridge and ill doubt ill see that lol

[Kash_]

Sure it wasn\'t 180kph as this is the standard speedo reading on most imports?

[chrisJDM]

ok enough taking the mick, i have seen alot of people who believe the standard speedo :p

Most likely thing mate is that one of the tubes in the "rats nest" has come loose/split or something like that, i think everyone who has had the twins has had issues with the "rats nest", ive had enough of mine now and am going single soon :chat

[DR SCHNITZEL]

I question the accuracy too. the road lines all became one though lol. And yes im sure the reading wasnt in kph, lol 180kph would only be 90mph or similar. God what are you all like. Im trying to find a solution to my problem. Ill just rip my engine bay apart and find the leak and replace all the pipes using the simplified setup, im on poor mans non seq at the mo so  i may as well do that too.

[RobbieRX-7]

Best thing to do is take a satnav that measures speed and see what your top speed is. The tomtom satnav i have is only 2 mph out as ive tried it in 4 different cars

[DR SCHNITZEL]

Yeah i was thinking that, when i went around europe the speed, was about 5 mph out at 125, and about 2 mph out at 70, clock to sat nav, i have one on order now. I think maybe 15mph out max, so 165mph  maybe more realistic when reading 180. I need a cerbera, they do 185 out the box and they are pretty cheap these days.

[Ed_RX7]

yes but ther are ****E!!!....worse reliability than a rex!!!

[skybusr34]

i had my rex showing 175 mph on a set of converted mazda speed dials once. if you allow 10% for speedo inaccuracy it would still be 158

[grinder]

according to a friend of mine - he got the PFC to show 189 on the ring ??

[DR SCHNITZEL]

Cerberas are a beast. If i was interested in reliability i wouldnt have owned 2 rx7s.

[mx1311]

Cerberas are a beast. If i was interested in reliability i wouldnt have owned 2 rx7s.

cerbs are probably the most unsafe car on the road in an accident

ive had the misfortune of loosing a friend in a cerbera in a rta put me right off the idea of selling my fd to buy one

colum