Miata Turbo Forum - Boost cars, acquire cats.

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-   -   300hp to 400hp upgrade (https://www.miataturbo.net/build-threads-57/300hp-400hp-upgrade-91918/)

Forrest95M 01-24-2017 11:42 AM


Originally Posted by mmmjesse (Post 1388457)
in for -CATastrophic failure.. for 400 you are going to really want billet oil pump gears and a dampner. Its not about rpm, its about the power you are putting through the crank.

It really scares me that you are doing this yourself and you do not know what a keyway is and did not know that a 6 point socket really wont do the job for a 12 point head bolt. Thats super basic info.

ignorance is bliss, I think.....

Der_Idiot 01-24-2017 12:01 PM

I passed on the billet pump gears. Running a supermiata pully, it's just good practice. Everyone in the racing community rolls with one of these, shit breaks real quick at 400hp - I should know, I"m well over that figure.

capitalcrew 01-24-2017 12:09 PM

Sub'd for what not to do.

Ryan_G 01-24-2017 12:56 PM


Originally Posted by Der_Idiot (Post 1388467)
Running a supermiata pully, it's just good practice.

I would like to point out that this is not the only damper choice. There has also been much debate on this forum about whether this is the best choice for a damper due to its methods for damping. I know it has been run with success on many race cars so I am sure it is adequate but there is more too the conversation.

Reverant 01-24-2017 06:21 PM

I know at least two local 1.6 cars (97 and 00 - both euro cars obviously) that were in the 400+ hp region without dampers and billet pump gears. Both street racing cars, one of them would do like 25 pulls in one night straight. Lucky? Maybe so. I have billet gears on my engine and looking forward to a damper before I go over 500whp.

ryansmoneypit 01-24-2017 06:33 PM

Hmmmm. Still not something I'm willing to chance.

25 pulls....That's a run every 10 minuts for 4 hours. Im afraid I have to throw the Bullshit flag. Maybe a few, but 25 is tough to believe.

damn, I don't know. Maybe you guys race from like 6pm to 2 am. I guess then it would be a reasonable amount.

sonofthehill 01-24-2017 08:03 PM

I got to do 11 pulls one Wednesday night and there must have been 150 cars running that night. I think it's usually closer to 250.
If you win you get to keep racing.
(edit)We race front 3:30 to 10 PM.

ryansmoneypit 01-24-2017 09:48 PM

Wow, ok, I could be wrong then. The hillbillies where I live are a lot slower. 100 cars and I got a run every hour or so.

sonofthehill 01-24-2017 09:57 PM

I have been to slow days too but usually when someone spews stuff all over the track. Also weekend and holiday events are usually pretty slow.
There is a drag race at Sonoma this weekend. I might try to show up early and maybe get 2 runs in before I get sick of waiting and go home.
Wednesday nights are all locals who just want as many passes as possible.

elior77 01-25-2017 02:33 AM

Disassembly complete !

https://cimg8.ibsrv.net/gimg/www.mia...c24bdbf091.jpg
https://cimg9.ibsrv.net/gimg/www.mia...ac4c67eb65.jpg
https://cimg0.ibsrv.net/gimg/www.mia...1abd7022e0.jpg
https://cimg1.ibsrv.net/gimg/www.mia...520d24e007.jpg


I noticed that the numbers on the rods do not match the numbers on the pistons and do not match the cylinder number... someone been there before ?
I mean there is a number on the rod like "2" and a number on the piston "3" it suppose to be rod 2 piston 2 in cylinder 2 ?

The timing gear was a beach to take out...I think I need a new one...

Everything looks very very good, the cylinders walls, the pistons and rings and the crank.

Measuring and then to the machine shop :)

ryansmoneypit 01-25-2017 07:12 AM

The machine shop will do all of the measuring for you. If any of the journals are polished, turned or the cylinders are honed or bored, your measurements will change.

elior77 04-01-2017 05:18 AM

I gave the engine to a professional builder.
The bores measure with in spec but since I get forged pistons 83.5mm I understand boring is a must.

Anyway this is the (regular) part list:

VVT 05 engine

wiseco pistons 83.5mm 8.6:1
ebay rods
arp main and head
OEM seals
new block plugs
Victor Haines headgasket
OEM bearings
ATI damper
Boundery pump
new water pump and timing kit
new valve stem seals

Can I get 83mm for straight drop in ?

Thanks
Elior

nbfather 04-01-2017 12:10 PM


Originally Posted by shuiend (Post 1387602)
You might want to go for the FM2 clutch for the additional torque it holds over the FM1.

Put that clutch and flywheel combo in my kid's car and it just works....
I wouldn't want to drive it in LA traffic, but other than that it seems good to go.
Probably not good if you have sparrow legs.... :)

elior77 04-02-2017 03:04 AM

What specs do I look for in a turbo for around 350whp ?

Thanks

shuiend 04-02-2017 08:56 AM


Originally Posted by elior77 (Post 1402853)
What specs do I look for in a turbo for around 350whp ?

Thanks

An EFR 6758.

elior77 04-02-2017 08:57 AM

I am going for an ebay turbo, what spec do I look for ?

Miater 04-02-2017 09:27 AM

BorgWarner EFR 6758 179388 - 53.9mm A/R 0.64 T25 for 300-450 hp Turbo | eBay

elior77 04-02-2017 09:31 AM

funny :td:

shuiend 04-02-2017 10:35 AM


Originally Posted by elior77 (Post 1402876)
I am going for an ebay turbo, what spec do I look for ?

Check out patsmx5's build thread for some. Most people who start going for that power just buy an EFR because budget is no longer a concern.

alienmiata1 04-03-2017 05:45 PM

I made 300 maxing out an eBay turbo. It wasn't efficient. The lag was annoying. I switched to EFR and the power is way more useable. If you want 400hp you want an EFR. btw, have you ever driven a 400hp miata? It's kinda scary...


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