SeR_Cyclops
Member
- :
- Mazdaspeed Protege
So what should he have done to keep his car from doing this?
FML right?
- Thread starter sean22306
- Start date
SeR_Cyclops
Member
- :
- Mazdaspeed Protege
Would a J&S have saved this car?
haha funny this was a set of yours also. So you recommend CP over wiseco?
Would it be safe to run stock compression ratio when using meth? Don't really have a way to mess with timing.
Edit: Wouldn't I have known if detonation was occurring? I thought they always talked about "pinging" sound. Either way I've already decided next rebuild will get meth.
Last edited:
Maxx Mazda
Contributor
- :
- Stock P5
Let me get this straight, you want to run the 9:1 compression without timing control?
Get ready for another engine build... Knock is VERY hard to hear on the FS, you need to be running some kind of standalone even with methanol. At the very least you need a knock detection device.
CP pistons are the best pistons you can buy for the FS.
Get ready for another engine build... Knock is VERY hard to hear on the FS, you need to be running some kind of standalone even with methanol. At the very least you need a knock detection device.
CP pistons are the best pistons you can buy for the FS.
would the ssftc be sufficiant to run 15 psi on stated compression ratio?
Maxx Mazda
Contributor
- :
- Stock P5
Try it and find out! (eek2)
HondaEat-R
Member
I ran 15 psi, as did the previous owner, for quite a while. 9:1 compression, Arias Pistons. No problems. There is no standard for failure, no whp number, no psi, etc..
I think we've all seen people running ~14psi on the stock turbo, and even stock block sometimes, with no immediate ill-effects. I'm not discrediting what Max is saying, I just don't see why 15psi from the gt2554r @ 9:1 compression would cause problems based solely on that.
Hmmm...this sounds a lot like your engine issues. Check the plugs?
SeR_Cyclops
Member
- :
- Mazdaspeed Protege
He has a GT28rs and he is running 15psi.
Maxx Mazda
Contributor
- :
- Stock P5
The whole reason you run lower compression is so that you can up the boost with less risk of detonation. You will make more power off boost with higher compression, yes, but when on boost you will be able to run alot more boost safely and make more power that way. The methanol is just an aid in helping keep the engine safe while you push the limits. It's not a band-aid for a lack of engine management. I've seen TONS of people blow their engines while running methanol, and they sit there and scratch their heads and wonder why. You need some way to be able to control your ignition timing.
So, to answer your question, 9:1 is fine, but even with meth, don't expect to push past 18-20psi and expect it to be safe. You will detonate unless you pull timing, but then you'll be pulling so much that it would put out more power if you ran more timing with less boost.
I had my engine running 8:1 compression last season, and I easily stuffed 32psi in there with meth. I didn't like that though, off boost it was a slug. The engine only put out about 100hp until that turbo spooled.
So, it's a trade off. Figure out what you want to do. If you want a mild street build, 9:1 is great. If you have illusions of running "big boost" like some of us do, that's not gonna work.
HondaEat-R
Member
Garrett Reps told me over the telephone that the stock turbo can be ran at that psi level (15) with no problem, although outside of it's "peak efficiency". They had no concerns at all. Take into consideration, that I only run 12 max now, but still, while it's not a good top end or high psi turbo, it can in fact take it.
HondaEat-R
Member
It's unfortunate that I don't have time to read 4 pages of posts before I write a quick blip. I'll take some time off of work so I can get that done though... (shady)
Maxx, I don't plan on going any higher than where I'm at. 15-16 psi is where its going to stay at. I just want it to be a fun daily that still gets decent gas mileage. With my other project I'm going all out with a goal of 25-30 psi on a hx35/40.. but thats another story. I'll deal with that once I figure out what to do with the MSP.
All I want to do is run the 15-16 on the tater safely so I don't have to keep tossing money into it. What would you suggest is the best set up for that?
hondaeat-r, change your settings this thread is only 2 pages for me
All I want to do is run the 15-16 on the tater safely so I don't have to keep tossing money into it. What would you suggest is the best set up for that?
hondaeat-r, change your settings this thread is only 2 pages for me
yes 15psi is no problem from 2500-5000 rpm, hell you can run 20psi on that range, but when u are near redline with that level of boost it will kill the turbo fast. I followed the compressor map to figure it out, so with a boost controller like avcr, you can actunally tune the boost by effency island.
2000rpm 10psi, 3000 25psi 4000 20psi 5000 15psi 6000 8psi, you know what i mean.
SeR_Cyclops
Member
- :
- Mazdaspeed Protege
How will running high boost on a turbo near redline hurt the turbo?
New Threads and Articles
-
-
-
Can't pull a vacuum on my 2016 CX-5 coolant system
- By Sljorgensen
- Replies: 3