i have a d15b2 in my car right now that im thinking about doing a mini me to also i have a d16z6 block laying around im thinking if it would work and also create more power that i use the z6 pistons in the b2, or just keep the stock pistons for compression let me know what you think and what else i could do thanks

 

nobody has ideas

 

well think about it, your compression well be bumped up already with the mini me swap. adding the z6 pistons well up it even more.

 

you know if id need a bore or any draw backs from that add in compression

 

let me check on the bore, but your compression would be in the low 10's

 

i dont know a whole lot of compression but i understand you want low compression for turbos, would it be better to put my z6 pistons in my b2 for hp gains or just do the mini me for safety

 

okay, just looked. looks like the bore is the same. but my guess on the compression might be wrong. you might be in the high 10's close to 11's in compression. which will leed to more hp

 

i wonder if it would be greater then a full z6

 

oh, you want to turbo, didn't know that. if you're going to turbo, then just do the mini me swap, no piston swap. even with the higher compression, with a good tune, you'll be fine, but not to high.

 

a full z6 is 9:7.1 i think.

 

no im not planning on turboing it

 

i mean hp wise

 

well if you're not turboing it, then do the mini me swap with the z6 pistons. you'll probably be in the area of 10:7.1 compression, and with out it being dynoed, i can only guess that you'll be in the 120-130 whp range. stock z6 makes around 100 whp stock.

 

this is all bench racing type info. if you check out the FAQ, or try and looking it up. pretty sure someone has already done this, and they well have hp figures

 

thatd be a nice engine build and in a ef pretty quick

 

that's why a lot of people go this route if they have all the parts, and don't want to swap in a b series.

 

thats what im saying its kind of funny how much people put into like say ls's to get them swapped then get beat by a sohc that you dont even have to swap or put as much money into, i got a full d16z6 engine for 80 the only problem with it is a rod knock and look how much money i saved compared to a ls

 

8.61:1 for stock D15B2 and 9.14:1 for a stock D16Z6. A D15B2 with D16Z6 pistons should be close to 8.64:1 compression. This is when used with a D15B2 crank. Remember it IS 1.5 Liter engine for a reason, the D15B2s are destroked. They have 5.5mm less stroke than a D16. Also the stock head gasket for a D15B2 is .048" and the D16Z6 is .037". Also on the D15 and D16A6 the piston is .020" below the deck of the block where the D16Z6 is flush with the deck. This is solely because of the piston (when with the correct crankshaft).

I would just trash that motor and go and purchase a D16Z6. Or even get a D16A6 and put a Z6 head on it, you will yield better results of about 9.96:1 compression.

Finally there is only roughly 3% (possibly as high as 5%) gain in horse power for every FULL point in compression. So if you have a car that has 100 HP with 9.0:1 compression and increase the compression to 10.0:1 you might now have a 103 HP car. There are tons of factors and some will let you get above even a 5% gain, but those are typically only seen in racing.

 

see my answers were mostly bench racing type answers. ^^^ his sounds more legit.

 

your hp numbers dont seem right to me even if i do just a mpfi swap it make my car a pretty much si but then a mini me its too noticeable just to be a 3hp gain

 

Well for every point of compression increase, you get approximately 3~4% more power. This is increased power across the board at all RPM ranges. The increase in thermal efficiency from raising the compression ratio also improves the Brake Specific Fuel Consumption. This is a measure of an engine's thermal efficiency measured in pounds of fuel per horsepower per hour. The proportional gain in power falls off sharply at compression ratios above 14:1 and it is almost impossible to get a detonation-free burn at higher compression ratios than this, no matter what the fuel.

 

anyone else have some ideas get more then 1 source