Blew my motor

[Civib2]

Well I blew my motor the other day. So i need some segustions, First of all the delta wastegate that came with the kit can it handle like 15psi, This is what im going to do if i keep the car order a short block from howell, 8.6 comp and its already boosted, so tell me what i need to do, I have an emanage on the way, How do i break in the motor and with how much boost and how much boost can i run on stock injectors with a fully built bottom end, emanage and walboro 255 fuel pump with vortech fmu. and how much hp can i expect with say 15psi 8.6 comp?

 

[BigRand]

well my friend, it seems you and me are in the same boat, I just got my motor back, and I"m breaking it in right now. You just want to leave the wastegate and boost at stock levels. (5psi). You really don't want to put any load on the motor during the break in period, so if you had a spare headers that would work to. I didn't so I just stayed out of boost for the first 500miles, and I haven't really gone past 4000rpms. Now I hit boost a little bit but nothing where I'm trying to pull on anyone, just kinda happens when I'm driving and I need to get up to speed.

I wouldn't try to guestimate the horsepower numbers, until everything is together and you run a base line on the dyno to see where you start.
Your stock injectors won't take you past 9psi, I will have a set of 370cc for sale that should take you to 14psi but I figured you'd be wanting more boost than that. (440cc's should do ya good).

I also don't think you will be needing the SFMU for the emange, (well depending on how you use the emange that is), but it might come in handy for the break in period of the motor.

I know its pricey, but if your running the e-mange it might be worth it to ya. an e01boost controller that interfaces with the e-mange. You can launch and it will boost slowly so you won't spin your tires, and you can set exactly how much boost you want at what rpm, and the e=mange will do the fuel at that rpm as well with that set amound of boost.

Well good luck with whatever you got going, if you do want to look into the e01boost controller or any other emange parts for cheaper than avg. Just PM me.

 

[Civib2]

So where did you get your motor from, or who built it and what parts did u use. I am probably going to order the short block from howell so everything is put together so i can just swap blocks. But im so worried becuase they dont warranty it what if something with the motor goes wrong with them assembling it. what do id o

 

[BigRand]

Well, I had a seperate 420a motor, that I sent to a local machine shop in my area. And I paid them to assemble it too so I didin't have to worry about putting anything on wrong. The warrnty you get on the motor isn't really a warranty because anything can go wrong.
So the fact that howell doesn't warrnty your stuff shouldn't be too much of a problem.

Its just the break in of the intital start up that is most important. Have everything primed with oil, and start it up. Don't let it idle. and change your oil.

 

[XMasta19]

Yeah, they can't really just give you a motor and say have fun you've got full warranty, cuz they have no idea how you're gonna drive it ya know. The only problem I would see with Howell, is how long you'll be waiting for it

 

[Civib2]

K well help me out as much as you can guys, if i get the howell short block 8.6 comp whats the most boost and power i can get with stock injectors and safe becuase I cannot afford to blow this motor up if i guy it, and dont tell me to spring for the injectors because i really do not have the money

 

[XMasta19]

I don't get why you're saying you don't have the money for the extra parts, yet you're paying for an entire shortblock. What does blew your motor mean? Like I've said already, if you order that from Howell, you'll be waiting quite some time...and no I don't mean a couple of weeks. There is no need to really get bigger injectors or run more boost since you're still using an fmu, might as well stay at 7-8ish and play it safe.

 

[BigRand]

Yeah if you were turbo before run the same setup with a new block, at like 5psi and don't get into boost for the first 500miles.
You'll be aight.
If I were you, I'd open up the phonebook under the automotive section, and look for a machine shop. Either you and a friend take you current motor out and see if the machine shop can't clean it out and rebuild it for ya.Or you can take it to another place to have them take it out for ya. (you'd save money for option a)

Spend the money on a built bottom end, and run low boost until you can find someone who knows what they are doing and how to tune, before you turn it up.

 

[Civib2]

I dont care how long it takes im expecting it to take 8 weeks or so, no big deal winter is coming soon anyways. I have a really good custom shop who rolls out insane cars like 800hp supras and 600hp gti's as well as vettes, everything, I think im just going to have them throw the block in and tune it in house. what is the benifit to haveing lower compression yeah i know more boost but if you were to say run 10psi on a 9.6 comp vs 15psi on a 8.6 comp wouldnt they be in the same power area? you know what i mean.

 

[dr1665]

Another 420A engine option.

Aside from that, Pennsylvania is way out there in the northeast. If I remember right, NEDSM is pretty big up there. You might check out their forums and see if anyone relatively local has a lead on a good machine shop for you. It's how I found mine. All you need is one other DSMer to suggest a shop for you and you should be golden.

Get your new motor built and installed, then worry about how much boost you'll be able to run.

 

[Civib2]

Can someone explain to me what the difference is between long rod and standard. to my knowlege long rod is more tourqe but then why wouldnt everyone go long rod there has to be a catch so let me know

 

[BigRand]

I dont care how long it takes im expecting it to take 8 weeks or so, no big deal winter is coming soon anyways. I have a really good custom shop who rolls out insane cars like 800hp supras and 600hp gti's as well as vettes, everything, I think im just going to have them throw the block in and tune it in house. what is the benifit to haveing lower compression yeah i know more boost but if you were to say run 10psi on a 9.6 comp vs 15psi on a 8.6 comp wouldnt they be in the same power area? you know what i mean.

The reason we run lower compression on turbo cars is because its easier to fine tune and make adjustmets. We can make up the power differenence by upping the boost, but the lower compression makes it easier to tune spark, fuel, timing etc.

 

[dr1665]

The reason we run lower compression on turbo cars is because its easier to fine tune and make adjustmets.

Actually, using lower compression (unless you're running insane amounts of boost on it) requires less fine tuning. That is why it is so favorable among the average joe with a turbocharged street car. It's all a factor of tuning. You're going to get right up to the edge of global thermonuclear war inside your engine bay whichever CR you choose, but picking a lower CR motor means you have a bit more room to fudge things before you nuke your shit.

Personally, I like seeing the look on people's faces when I tell them I'll be turbocharging my 10.5:1CR block. I'll just have to use more than some disks and an SFMU to tune with. The technology is out there now, but many people are just uninterested in taking the time to actually do that "fine tuning."

 

[Civib2]

Ok i understand that now it makes sense, then i will deff be going witht he 8.6 comp so help me out with long rod or not guys?

 

[BigRand]

Actually, using lower compression (unless you're running insane amounts of boost on it) requires less fine tuning.

Okay thats what I meant by easier. I apologize.

 

[selmerguy]

you could always have a shop bore and hone your block. then you can put it back togeather with the good forged stuff. it's not that hard to put a motor togeather. i did very little work on cars before i built my motor. if i can do this anyone can. just get a haynes or chilton and start reading. good luck. btw i ordered my rebuild kit from ci and got in in less then 2 weeks.

 

[Civib2]

Guys the problem isnt building the motor I am a mechanic and have built motors before, I just dont have the time right now at all so Im going with a shortblock built so i can throw it in, but i need to know what to order like long rod or not

 

[BigRand]

Guys the problem isnt building the motor I am a mechanic and have built motors before, I just dont have the time right now at all so Im going with a shortblock built so i can throw it in, but i need to know what to order like long rod or not

Just go with the std rod size, less modification etc.