Dorian
dorian
Can you or would you use a long ram intake similar to the hyperpak intake instead of a shortie?
170 stroker turbo build
- Thread starter Dorian
- Start date
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I sure would, but I wouldn't stroke it.
Dorian
dorian
Ok why would you instead of shortie and why not stroke it?
Stroking one is great, but it slows piston speed. Piston speed is important for snappy response and even more so for building quick turbo speed. Just one old man's opinion.
Charrlie_S
Well-Known Member
Why stroke a 170, when you could just use a 198 or 225? Easier and cheaper.
Stroking increases piston speed. Piston has further to travel in one crank revolution. Hence increase in torque.
j par
Well-hung Member
You could add a small shot of nitrous to get the turbo going...
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I take it your planning on a 198 crank and the short 170 rods along with some 2.2 turbo as the basis for this stroker?
Hyper_pak
Old School Chrysler Fan
Long rams are tuned for a particular RPM to get a normally aspirated ram boost effect. With a turbo you don't need to do that. You want short compact runners to reduce turbo lag. Since you are boosting it, just use the larger engine, save some bucks for the good parts you will need to keep it alive at higher boost pressures.
Or use a 170 and blow it to pieces at 10000 rpm!
No don't do that either.
Or use a 170 and blow it to pieces at 10000 rpm!
No don't do that either.
diymirage
HP@idle > hondaHP@redline
That's right. I was thinking rod length. But you're right. As long as you stay with the same length or shorter rod the added stroke does increase piston speed.
I still say for a snappy street car, I'd stick with the stock stroke 170.
Dorian
dorian
Thanks for all your input guys. Please just bear with me and let me throw a few things around, we’re just talking here so this isn it costing me money lol
So first off...
I have a 198 crank to put into a 170, I have always wanted to build a 170 stroker.
so...
My idea is to build a stroker 170 keeping it relatively stock in the short block With a better cam and lifters and some mild porting to clean it up. Add an aftermarket carb and intake and make my exhaust to add a small turbo.
I don’t plan on big boost just enough to help with gas mileage and a bit of kick.
there are other upgrades I have read hear and on .org that will help improve drivability and performance. I plan on going thru those one at a time and seeing what improvement is made as I go.
So first off...
I have a 198 crank to put into a 170, I have always wanted to build a 170 stroker.
so...
My idea is to build a stroker 170 keeping it relatively stock in the short block With a better cam and lifters and some mild porting to clean it up. Add an aftermarket carb and intake and make my exhaust to add a small turbo.
I don’t plan on big boost just enough to help with gas mileage and a bit of kick.
there are other upgrades I have read hear and on .org that will help improve drivability and performance. I plan on going thru those one at a time and seeing what improvement is made as I go.
Charrlie_S
Well-Known Member
Is there a particular reason you want to make a 198 out of a 170, rather then use a "real" 198?
Charrlie_S
Well-Known Member
I'm thinking about building a 170/198 engine, myself. But my reasoning is, in the slant six racing series, running the low deck engine puts the vehicle in the next lower class. In other words, if my car fell in "C" Nitrous with a 225 or 198 raised deck engine, it would fall into "D" Nitrous with a 170 engine or a 170 stroked to 198 cubes, with no weight change. Other then for that reason, to me, it makes no sense to spend the time and money to build a 170/198 stroker.
Dorian
dorian
I don’t think I am anywhere near where I could race in the series to qualify but I do want to race it locally and drive it on the street too.
The 170/198 will rev higher and that will work well with the turbo at the top end.
Charrlie_S
Well-Known Member
Actually the "revability" would be the same as a regular 198, unless you opt for light weight rods and pistons, and that could be done on a 198 for about the same money.
Charrlie_S
Well-Known Member
Don't get me wrong, it's your car/engine/money. If that's what you want, go for it. Just want to make sure you realise what is what.
Dorian
dorian
Ok what about the rev limit I was led to believe from what I read is the 170 will rev much higher than the 225
Dorian
dorian
No problem here on my end that is why I opened up this discussion in the first place.
So besides the class restrictions for the 170 compared to the 198/225 Why do you like the 170 so much
Charrlie_S
Well-Known Member
A 170 will rev higher then a 225, or a 198 for that matter. The 170 has a shorter stroke then a 225, or a 198, or even a 170 made into a 198. The 170 crank is lighter, then the 225 or 198, as are the rods (stock) and the pistons all weigh the same (stock). If using after market "race" parts that can change. Just remember the old saying, "speed costs money, how fast do you want to spend".
Charrlie_S
Well-Known Member
The main reason I like the 170, is that is what I had when I started racing slants in "stock eliminator" way back when. I just ran what I had, and had many 170 spares. I am a "low dollar" racer. A 170 is actually a little "trickier" to build then the 198/225. Piston to valve clearance is an issue, no budget "race" type rods. Only headers available are the Aussiespeed. I have run the 225 engine ( never ran a 198) and have run quicker in the same car as the 170.
Dorian
dorian
I understand that from your other posts I have read over the years, I get that.
I have no illusions that I can go faster with the stroked 170 compared to a 225 given the same modifications to both motors.
I just like the idea of using the 170. 50lbs lighter on the front end doesn’t hurt either.
As for Headers I plan on building my own.
What pistons are available to use with the 198 crank and the stock 170 rods or are they a custom build? I plan on collecting the parts needed and building on paper what I need to do before actually starting the build.
I probably will start with a better cam and lifters right off the bat. As for the rest probably stock as much as possible
Charrlie_S
Well-Known Member
Building on paper first is an exelant idea. As for pistons you'll need to do some research. I haven't done it myself . There was some discussion over at slant six dot org do a search over there.
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