Slant Six Bumblebee
Well-Known Member
Dont know how i missed that my apologies Only 16 and my eyes are playing tricks on meThat is where the formula at the end of the post comes in.
Dont know how i missed that my apologies Only 16 and my eyes are playing tricks on meThat is where the formula at the end of the post comes in.
for now im using my stock 72 bottom end (including the cam) as i did not pull the motor. Maybe this summer i will pull the motor and give the bottome end a refresh (rings bearings timing chain ect) When i do that i will take my cam up to orgen to get it reground for a turbo.I forget if you've said so forgive me, have you chosen a camshaft?
It oughtta have a lotta balls on the bottom end then!for now im using my stock 72 bottom end (including the cam) as i did not pull the motor. Maybe this summer i will pull the motor and give the bottome end a refresh (rings bearings timing chain ect) When i do that i will take my cam up to orgen to get it reground for a turbo.
No Problem, there are times I wish I was 16 again,Dont know how i missed that my apologies Only 16 and my eyes are playing tricks on me
we will see i guess. My plan build the turbo motor then run it na while i build the rest of the car(I want to paint it reupholster new stearing suspension brakes and rewire the whole car MY WAY (relays 100% waterproof connectors all leds custom switches) the do the turbo right the first time.It oughtta have a lotta balls on the bottom end then!
this was one of the main reasons i went with the os valves because my current seats had some major pitting in them im surprised it ran as well as it did.No Problem, there are times I wish I was 16 again,
Another way that OS valves can help is, if you have new seats cut into an existing valve seat, that can sink the valve further into the head and that really hurts flow at low lifts.
Cutting in new OS seats gets you a new valve seat up on top of the head where it belongs.
Lol! Yeah, that's the bugaboo in that calculation...my head gasket is hopefuly not 380 thouth thick
You're only 16 and you like slant sixes?Dont know how i missed that my apologies Only 16 and my eyes are playing tricks on me
Yeah it runs in the family just with bigger engines my mom has a 73 duster for her first car and my grandpa has a 73 challanger 383, 69 charger numbers matching 383.You're only 16 and you like slant sixes?
There might be hope for the world yet.
I'm impressed you don't want to throw it in the ditch for a V8.Yeah it runs in the family just with bigger engines my mom has a 73 duster for her first car and my grandpa has a 73 challanger 383, 69 charger numbers matching 383.
I got my dart when i was 15 and have been fixing it up for a little over a year now.
well i did for a while espicly after getting my grandpa to floor it in his challanger as it has a stout motor (383 stroked with a 440 crank cam forged ect...) but i got real tired of the never ending line of v8s at every car show.I'm impressed you don't want to throw it in the ditch for a V8.
It's really boring, isn't it? I've had the most fun ever since I went to the slant 6.well i did for a while espicly after getting my grandpa to floor it in his challanger as it has a stout motor (383 stroked with a 440 crank cam forged ect...) but i got real tired of the never ending line of v8s at every car show.
I also figured if i get luck and my granpa doesnot sell his cars before i make more i can buy them from him and have a full aresonalIt's really boring, isn't it? I've had the most fun ever since I went to the slant 6.
The calculating teh cc is not a issue for me it is knowing how much to cut off the deck to get the desired cc.
be good to him, maybe he will "will" them to you especially if you show interest without being a pain.I also figured if i get luck and my granpa doesnot sell his cars before i make more i can buy them from him and have a full aresonal
Ok thanks all for the good info i have a better idea of what i need to do now. I have another question about how much to shave off the head. I am keeping the stock bottom end and using a .040 felpro and want to have a target compresion of 8.5:1 but dont know how much to take off. I know there are calculators but shaving the head will affect teh cc and i dont know how to calculate the new cc.
Ok thanks all for the good info i have a better idea of what i need to do now. I have another question about how much to shave off the head. I am keeping the stock bottom end and using a .040 felpro and want to have a target compresion of 8.5:1 but dont know how much to take off. I know there are calculators but shaving the head will affect teh cc and i dont know how to calculate the new cc.
well i did for a while espicly after getting my grandpa to floor it in his challanger as it has a stout motor (383 stroked with a 440 crank cam forged ect...) but i got real tired of the never ending line of v8s at every car show.
Well using all my dimensions except the head cc and to get to 8.5:1 i would need to mill 46 thousands which does not seam excessive.are you sure you can get there with just cc volume? I have not studied your calculations here in depth but I recalled it would take a ton of shaving to get the cc’s to mid 8 CR when I was doing mine.
Well using all my dimensions except the head cc and to get to 8.5:1 i would need to mill 46 thousands which does not seam excessive.
View attachment 1715888860
I got to over 10:1 with milling the head on my current engine.....although it was not on purpose. LOLare you sure you can get there with just cc volume? I have not studied your calculations here in depth but I recalled it would take a ton of shaving to get the cc’s to mid 8 CR when I was doing mine.
well i am unsure of what my current cc is because im getting larger valves installed then i will cc my head and then cc the head after but i doubt it will be larger then 60how many cc’s reduction do you need? Ok less than 10cc. Guess I’m remembering wrong
well i am unsure of what my current cc is because im getting larger valves installed then i will cc my head and then cc the head after but i doubt it will be larger then 60
Dad said to me, "Jimmy, you gotta be smarter than your oversized valves when you install them too. Done wrong they can easily reduce your flow."I've seen @IQ52 (Jim Laroy) make the comment that larger valves make more power everywhere in the RPM range. He oughtta know. lol I think the larger valves are certainly worth it, especially with a slant 6.