BPT forged internals
 

Hey guys,

I'm looking at getting forged internals for the bp motor this month but I don't know what's the best comb (piston and rod) out on the market ATM. There are heaps of kits on eBay but how good are they actually..

Cp forged pistons and eagle rods R the ones I'm looking ATM..

And what r the best bet for main and small end bearings??? Genuine or is there an aftermarket version out there??

I am using JE pistons and rings and was off ebay and run ETD racing rods as their website say they are tried and tested on the MX5 for about 600hp from memory a lot cheaper than going carrillo rods, bearings i think the shop used ACL race bearings im not sure

they are all as good as eachother. just have a read of the descriptions if buying from ebay. some offer rings, some dont.

I am fan of arias pistons. Any motor I have had has always ran silent with these branded pistons. I have heard wisco piston chatter at idle in a bp n/a and heard other rumours of excess noise with wisco pistons.

Again if whether they were installed properly is another thing

can u get arias pistons for a bpt??

you can get any brand piston for any motor for any spec... they are all custom made to order

What do you want from the rod/piston? What rpm range? Etc.

i just want to lower the compression down to 8.5.1 and go to about 7.5-8k rpm..

and how much boost you want to run?

about 20 max... well im thinking about using a gt28 or gt30.. atm i have a vf10 hybrid..

8.5:1 would be raising the compression on a bpt.

and if you're chasing 7.5-8.0Krpm, you might even need to go higher compression again. hope you got a very good tuner lined up Matt.

wha??? i thought they where at 9.0 comp standard???

i take that back.. hmmmm well i was looking at one of those ebay mx5 kits and there all 9.0 and 8.5 comps..

http://www.ebay.com.au/itm/Wiseco-Fo...item3f14231426

http://www.ebay.com.au/itm/CP-Forged...item3f1418bf45

BPs in the BG and BA were 9.0:1 (really 8.8:1), but not the BPT... they were 8.2:1

at 20psi, you better start worrying about breaking the gearbox instead of the engine!

im aready ahead of u there.. new gear box is going in very soon..

but back to the internals.. so the kits above arent right r they?? i was told that they would work. :(

those are fine to use. just depends on the engine outcome you are looking for.

I'm using SPS pistons. Aussie made. They did a 8.3:1 CR for me

well honestly im looking for a more touque engine.. not something that is high reving.. so the standard rev range is fine for me.. :)

which is it?

lol ok sorry let me be clear, standard rev range is fine for me.. 8k would be to much and i'd have no touque down in the low rpm range.

I would go with wiesco pistons and what ever brand of rods you want. The eagle rods are a little heavier than some of the other rods but a good rod for the money. Only reason I say Wiesco is because they have a protective coating that holds up to high heat for a longer period of time than the others. I have a set of Weisco 9:1 pistons in my bp. A stock bp with a good tune with take 300 whp for quite a while but the rods are the weak point. Oil pump gear have also been known to break. I would invest in a set of boundary engnering oil pump gears they are good insurance.