Hey guys. I'm soon to boost my single cam. The engine itself runs like new and doesn't have too many miles. I've always babied it but I Know thats not gonna change anything in the long run. I'm looking to still daily this car, but boost the motor on the stock everything it has. Would like 6 psi be the top i could run or would i still be blowing **** everyday? thanks a lot ht

 

I run a 95 EG ex Coupe w/ stock d16z6 with a T3/T4 turbo,FMIC,Stock un-tuned ECU, Wastegate with 7/8lb spring, not sure, but my boostgauge shows about 7-8 at full boost. I rape it every chance I get, thats what putting a turbo on your car is for right? No problems, and I drive it daily. Hard. I know people that have boosted stock motor to 12psi. Honestly I wouldnt go over 10. Your cylinders will start to walk at that point-they move independantly because they are waterjacketed. Thats what block guards are for.

I wouldnt worry about putting the turbo on a stock motor. Just leave the stock spring in the wastegate,and get it tuned right and you'll be tearing up the streets.

 

I have a D16Y8 stock motor with a TD04H turbo and run 9PSI daily. While it is not a DD I do drive it a lot and it has 134K miles. Just makes sure you do not go cheap and use a wastegate and a BOV. A turbo is basically two systems in one, an intake side and an exhaust side. Tuning is also key so be sure you bring it to someone who has a vast knowledge in that area. Also be sure your A/F stays around 14, might be rich but it will help the motor good.

 

you can safely run 200-240hp, maybe even more, on a stock sohc on a good conservative tune and regardless of what turbo you use or psi it takes to make that power. honda motors, sohc or dohc, can take a beating and be reliable if it's well tuned. goodluck!

 

 

^^x2

This

220-240whp is the safe range for a stock D series...beyond that, the toothpick connecting rods begin to bend.

 

Where do you guys come up with this 220-240 or 250whp???

 

Experience

 

Care to share some dyno's, pics, etc??? I see many people claiming that the SOHC can with hold up to 250whp, or in your case 240whp but no one shares any data to support this. Please do not forward me other links, I want to see what you have to support this and how you achieved this on a stock D16.

 

u run your car untuned? how long has that lasted? u still have ringlands

 

My car made 210whp for over a year before I put my built engine in. Daily driven every single day, could have easily handled another 30whp without a problem, I was at 7psi on a T3To4e 57trim.

IMO, these engines can probably handle a good more than 250whp, the rods are bending from poor tunes moreso than their physical strength. Too many people tune Dseries like they tune a Bseries, and all of the timing beats the crap out of the rods. However, for the price of a Vitara build, there's no point to try and push more than that out of them.

 

So like me, you also made 210, me 209.5 but all the same. I will not agree or disagree on what the D series will make but there is two sides to this. As the OP said reliable power and max power. Reliable I say 210 but 250 I feel is way too much for the stock rods. I have seen a D at around 300whp but after the first pass, boom. This is why I ask for actual facts, not forum speak. Also I am not sure what the stock clutch will hold but at 210 it seems fine, just a bit rough going in to 2nd, doesn't want to grip. Not sure if all y8 trannies would be the same?

 

250whp is safe IF its TUNED by someone who knows what there doing. i Had Stock Z6 a few years back with a 50 trim turbo on it. Made around 300whp on 15 psi. daily driven for almost 1.5yrs. sold to new owner he drove it for almost a year then built the motor.
Car ran 12.10's at 115MPH.

 

Do you have any factual data to backup that claim?

 

here's one https://honda-tech.com/forums/showth...ght=d16z6+dyno

and here's my dyno sheet of my stock d16z6/ebay kit on 10psi. 246/223




original thread
https://honda-tech.com/forums/showth...ght=d16z6+dyno

tuned on crome. abused it for 3k miles until i pulled the kit off and sold the car.

this is what it boils down too

 

Buddy of mine put an ebay kit on his d16z6 when it had about 200k on it. Was tuned for 6psi but ended up running 10-12psi all day, and he would beat the car senseless. It lasted nearly 30k miles and went through two turbos before a rod finally shot through the oil pan.

 

6400 rpms??? I have mine dyno'd out to 7500....

 

cool story bro

 

exactly.

over revving could have a lot to do with rods bending.

 

I dont know about 250 or 300 on a stock block. Im shooting for around 190-200 to keep it safe. Just gonna run the big red spring in my Tial and Delphi 440's on AEM EMS version 2. When i dig into the bottem end then i'll up the boost. 15psi stock block seems a little crazy to me...

 

I talked to a few Honda tuners as this thread made me ask around. It seems the general idea is to stay around 210 on stock internals for a long lasting motors. 220-250 is dangerous as the D rods typically do not like it. If your shooting for reliability I would highly recommend 200-210whp. If you do not care as you have an LS or GSR motor awaiting to be dropped in whenever then sure 220-250whp can be accomplished.

I am not sure if it has to do with such a high RPM range but can anyone else confirm 220-250 whp at 6500 rpms? Anyone able to hit 220-250 at 7500 rpms?

 

Just because you cant/ havnt done it. Doesnt mean it cant be done. I wish some people would stop being so closed minded... But I do understand that this is HT

 

It has nothing, at least in my case, of being closed minded. I have been around awhile on other forums and anyone can say whatever, but proof is proof and no one can change that. In regards to boost and a D motor, we all know the rods are weak, no one can argue that. I also don't don't some of these motors are stronger then others, look at the old sand casted motors. No two were 100% the same, regardless of their potential. I see more people showing information running 200-210 versus 220-250 yet everyone says go ahead. I rather reliability.

 

would have been less shocked to see jesus walk out of the sky

i just can't believe that engine is alive with 8lbs and no tune

 

you shouldn't turbo it! unless you tune it!!!!