Can I run 10-15 pounds of boost on stock valve train/cam shaft

I have lower compression pistons 9.5-1, and rods in a sleeved block.

I'm trying to save as much money in my engine rebuild as I can and my cams are in perfect shape, I just need to get my valves replaced, will I have any significant issues? Or will the crower valves run with the stock springs? and is that a good idea?

 

Spend a little time searching before you post....Just a heads up before the animals are out of their cages.....


The answer to your question: YES
Read up though man....theres so much to learn here.
Most BIG BOOST guys run stock cams into the 4-500's...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ::NirVTEC:: &raquo;</TD></TR><TR><TD CLASS="quote">Spend a little time searching before you post....Just a heads up before the animals are out of their cages.....


The answer to your question: YES
Read up though man....theres so much to learn here.
Most BIG BOOST guys run stock cams into the 4-500's...</TD></TR></TABLE>

x2

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ProjectBB6 &raquo;</TD></TR><TR><TD CLASS="quote">

It took FOUR generations to Perfect one idea...BB1, they gave up after they tried to perfect PERFECTION and failed.....5th gen...BB6</TD></TR></TABLE>

FIXED!

 

yes you can boost 15psi with stock valvetrain

 

ya shouldnt have any problems at all

 

Thanks guys, I searched a little but I was mostly really tired and could barely see the screen thanks for the heads up though!

Can you use stock pistons and upgrade the rods?? or is that a big no no?? I decided I was just going to use a turbonetics bolt on kit and just run 8 pounds and since my engines apart I figured I'd put in new rods but again saving money I'd rather not do the pistons since I have a set of brand new pistons(stock) and I don't want to have to sleeve the block(ie too much cash)

Sorry if I sound like a huge noob, I usually work with 16 second mullet rides (muscle cars) haha

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xxphunkxx &raquo;</TD></TR><TR><TD CLASS="quote">Thanks guys, I searched a little but I was mostly really tired and could barely see the screen thanks for the heads up though!

Can you use stock pistons and upgrade the rods?? or is that a big no no?? I decided I was just going to use a turbonetics bolt on kit and just run 8 pounds and since my engines apart I figured I'd put in new rods but again saving money I'd rather not do the pistons since I have a set of brand new pistons(stock) and I don't want to have to sleeve the block(ie too much cash)

Sorry if I sound like a huge noob, I usually work with 16 second mullet rides (muscle cars) haha

</TD></TR></TABLE>

If anything I would say that someone would upgrade PISTONS not RODS. Its the RING LANDS on the OEM pistons that are BOOSTs worst enemy.
Have you ocnsidered MAHLE pistons and Eagle rods. Thats an option for under $1k.
Search around a little for current input on MAHLE pistons.(don't require sleeving) another option would be using SLEEVE LINERS with CP/Wiseco forged pistons.

Hahahaha....16sec Mullett rides!.....So many people don't realize that a 300hp/400tq 4000lb car is slow! I've seen my fair share of slow *** Muscle Cars run thats for sure!

 

haha yeah, They can be slow but when you got some good power running then your all set haha

We're all seen our fair share of 8-10 second 69 fast backs

I understand about the pistons I just wanna keep cost down. I already have rods so I just wanted to know if I could upgraded rods with the stock pistons? I'm only running 7-8 pounds of boost anyway, I don't want to say for sure but I don't it will shred my pistons apart?

 

The problem with OEM Pistons has to do with inconsistencies in Metalurgy. Sometimes they will last for a long time with lots of power and other times they will shred with little power very quick. If youre using New OEM pistons, they SHOULD last longer than if you used old ones.
I say don't cheap out and at least look into Mahles as a Cheap Way out!

for the Boosted 250C.I. Straight6 in a 2nd gen NOVA Chassis of my DREAMS!

 

I looked up threads on the MAHLES

Seems like they are priced for 449? Couple people say theres still some bugs to be worked out but the threads are over a year old.

So they fit perfect with eagle rods?? I'm just trying to get as much info as possible. I basically have a 5000 dollar limit on the engine

I already got 3k into the turbo kit (Turbonetics Bolt On) and some money in a better clutch

My Costs So Far:

Clutchmasters FX300 $453
hi flow cat 2.5"in/out $105
Turbonetics kit $2900
Ingalls Tourque Damper $341

Any Ideas, my old pistons/rings are all messed up so I either need to:
A.) buy new OEM ones from the stealership
B.) sleeve m block and spend an assload of money I don't have
C.) Figure out this MAHLE/Eagle route

Any information is helpful, suggestions are great.

 

option B. is the best and virtually bulletproof
option C. is more cost effective, IF IT HOLDS UP. If it does not, you will spend B. plus C. in the end
The main thing I keep hearing about the Mahle and this is true with any piston, is the piston to wall clearance must be what the manufacturer says it should be.
I am not an engine builder but I have been reading about these pistons for a couple years now. Mahles are made from a different alloy that is also heavier than other types of forged slugs. I am still considering them for my build , I will only be shooting for about 300-350 whp. Also, with the Mahles OEM rings are what I have read should be used. Good luck.

 

You couldve passed on the TQ damper......
Not a fan of Turbonetics turbos....
My suggestion would be find a PORSCHE shop to talk to about MAHLEs in FRM sleeves.
Budgets and Boost usually don't go in the same sentence together.......
My "BUDGET"(for lack of a better word) was about $15k......and there was still stuff missing. Ive since scrapped the Boost Bug in favor of making alot of Nitrous power......

 

I know boost and budget don't really go well together but not all of us can do 15k+ I'm just looking for that little extra power from the turbonetics kit. and if I can use stock pistons and get away with it I will. I'd just rather not dump all that money into the engine when in a two years I'll have another h22 completely built ready to drop in. Sooo I wanna get away with this for 2 years if I can. I also have a truck I can use so I'm not overly worried. The cars mostly project and fun.


Can I get information on the stock pistons?? I'd like to know what their tolerances are for running 8 pounds of boost? Lemme know what kind of engine damage has occured as a result of using the stock pistons. I would be buying new stock pistons is that counts for much, Will eagle rods work on the stock pistons?(not saying I'm doing this just wondering)

 

like I said I'm only gonna be doing about 8 pounds of boost, Is this considered safe zone in a h22??

 

Yeah Budget and boost definately dont go together. Your thread in the Drag Racing Forum and this one are totally different. In there you are talking about having the head built, getting the bottom end done or buying one from another member.

You might want to take a step back and really figure out what your budget is and make a good plan for what your goals are.

and yes you can get away with 8psi of boost on a stock bottom end as long as you have a safe tune.

I hope that you put some of that money aside for tuning. 600-1000 depending on what system you go with and who does your tuning.

 

yeah the thread in the drift forum is not my car haha, thats one of the other guys cars HE HAS the money haha Thats why I made a seperate thread.

I just bought this bad larry about 2 days ago =D it was already ripped apart as a parts car so its ready to go for what I'm talking about here. I'm figured I'd ask my questions here instead of filling the drag thread with my questions over questions about his car.

 

Boost pressure doesn't affect the valvetrain very much, it's mainly rpms that will stress it.

 

I guess I thought it was the same car because you are going with the same turbo setup as the other car in the drag racing thread, and you said in the other thread that you wanted to run 10-15psi of boost and then started off in this thread saying the same thing.

 

If you look around, you can get a Turbonetics kit from Treadstone Performance in Miami for around 1800.00. You also loose that torque damper and you got a sleeved block and almost enough for some good pistons.


Modified by Apex1972 at 1:52 PM 2/13/2008

 

for Turbonetics Turbos
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xxphunkxx &raquo;</TD></TR><TR><TD CLASS="quote">like I said I'm only gonna be doing about 8 pounds of boost, Is this considered safe zone in a h22??</TD></TR></TABLE>
Somewhat......
If you can't afford to do it right the 1st time, don't do it.
If you can't afford another motor when/if your blows, you shouldn't BOOST!

Words I live by!

 

what exactly is the problem with Turbonetics.I figured thats at least better than 99% of the other crap sold on ebay. Not saying you don't know what you're talking about either NirVTEC I just want your reasons because I want to boost an H22 in the future so I am in the process of getting as much info from non noobs such as yourself. Hell I have also been considering teh NOS so lets hear it man.